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data-mw-ve-target-container> <div class="vector-body-before-content"> <div id="siteSub" class="noprint">From Wikimedia Commons, the free media repository</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr">    </div><div class="mw-category-generated" lang="en" dir="ltr"><div id="mw-subcategories"> <h2>Subcategories</h2> <p>This category has the following 9 subcategories, out of 9 total. </p><div lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-category mw-category-columns"><div class="mw-category-group"><h3>C</h3> <ul><li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_about_cameras" title="Category:Gallery pages about cameras">Gallery pages about cameras</a></bdi> <span title="Contains 0 subcategories, 35 pages, and 0 files" dir="ltr">(35 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li> <li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Gallery_pages_about_computing" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_about_computing" title="Category:Gallery pages about computing">Gallery pages about computing</a></bdi> <span title="Contains 6 subcategories, 15 pages, and 0 files" dir="ltr">(6 C, 15 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li></ul></div><div class="mw-category-group"><h3>E</h3> <ul><li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Gallery_pages_of_electricity" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_of_electricity" title="Category:Gallery pages of electricity">Gallery pages of electricity</a></bdi> <span title="Contains 1 subcategory, 17 pages, and 0 files" dir="ltr">(1 C, 17 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li></ul></div><div class="mw-category-group"><h3>F</h3> <ul><li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_of_furniture" title="Category:Gallery pages of furniture">Gallery pages of furniture</a></bdi> <span title="Contains 0 subcategories, 16 pages, and 0 files" dir="ltr">(16 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li></ul></div><div class="mw-category-group"><h3>L</h3> <ul><li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_about_lamps" title="Category:Gallery pages about lamps">Gallery pages about lamps</a></bdi> <span title="Contains 0 subcategories, 12 pages, and 0 files" dir="ltr">(12 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li></ul></div><div class="mw-category-group"><h3>M</h3> <ul><li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Gallery_pages_about_machines" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_about_machines" title="Category:Gallery pages about machines">Gallery pages about machines</a></bdi> <span title="Contains 3 subcategories, 42 pages, and 0 files" dir="ltr">(3 C, 42 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li></ul></div><div class="mw-category-group"><h3>T</h3> <ul><li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_of_telecommunication" title="Category:Gallery pages of telecommunication">Gallery pages of telecommunication</a></bdi> <span title="Contains 0 subcategories, 9 pages, and 0 files" dir="ltr">(9 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li> <li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Gallery_pages_about_tools" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_about_tools" title="Category:Gallery pages about tools">Gallery pages about tools</a></bdi> <span title="Contains 1 subcategory, 34 pages, and 0 files" dir="ltr">(1 C, 34 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li> <li><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Gallery_pages_about_transport" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/Category:Gallery_pages_about_transport" title="Category:Gallery pages about transport">Gallery pages about transport</a></bdi> <span title="Contains 7 subcategories, 39 pages, and 0 files" dir="ltr">(7 C, 39 P)</span></div><div class="CategoryTreeChildren" style="display:none"></div></div></li></ul></div></div></div> </div><div id="mw-pages"> <h2>Pages in category "Gallery pages about technology"</h2> <p>The following 127 pages are in this category, out of 127 total. </p><div lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-category mw-category-columns"><div class="mw-category-group"><h3> </h3> <ul><li><a href="/wiki/Commons:Valued_images_by_topic/Activities/Techniques" title="Commons:Valued images by topic/Activities/Techniques">Commons:Valued images by topic/Activities/Techniques</a></li></ul></div><div class="mw-category-group"><h3>A</h3> <ul><li><a href="/wiki/Aachener_Revier" title="Aachener Revier">Aachener Revier</a></li> <li><a href="/wiki/Acoustic_cleaners" title="Acoustic cleaners">Acoustic cleaners</a></li> <li><a href="/wiki/AI-generated_media" title="AI-generated media">AI-generated media</a></li> <li><a href="/wiki/Aqueduct" title="Aqueduct">Aqueduct</a></li> <li><a href="/wiki/Ashtray" title="Ashtray">Ashtray</a></li></ul></div><div class="mw-category-group"><h3>B</h3> <ul><li><a href="/wiki/Beer_bottles" title="Beer bottles">Beer bottles</a></li> <li><a href="/wiki/Bell" title="Bell">Bell</a></li> <li><a href="/wiki/Bookcase" title="Bookcase">Bookcase</a></li> <li><a href="/wiki/Brick" title="Brick">Brick</a></li> <li><a href="/wiki/Bronze" title="Bronze">Bronze</a></li></ul></div><div class="mw-category-group"><h3>C</h3> <ul><li><a href="/wiki/Cable_drag_chain" title="Cable drag chain">Cable drag chain</a></li> <li><a href="/wiki/Camouflage" title="Camouflage">Camouflage</a></li> <li><a href="/wiki/Card" title="Card">Card</a></li> <li><a href="/wiki/Chimney" title="Chimney">Chimney</a></li> <li><a href="/wiki/Climbing_equipment" title="Climbing equipment">Climbing equipment</a></li> <li><a href="/wiki/Coffee" title="Coffee">Coffee</a></li> <li><a href="/wiki/Coffee_pot" title="Coffee pot">Coffee pot</a></li> <li><a href="/wiki/Cognac_(eau-de-vie)" title="Cognac (eau-de-vie)">Cognac (eau-de-vie)</a></li> <li><a href="/wiki/Compact_Cassette" title="Compact Cassette">Compact Cassette</a></li> <li><a href="/wiki/Compact_Muon_Solenoid" title="Compact Muon Solenoid">Compact Muon Solenoid</a></li> <li><a href="/wiki/Compass" title="Compass">Compass</a></li> <li><a href="/wiki/Concrete" title="Concrete">Concrete</a></li> <li><a href="/wiki/Cotton" title="Cotton">Cotton</a></li> <li><a href="/wiki/Crankshaft" title="Crankshaft">Crankshaft</a></li></ul></div><div class="mw-category-group"><h3>D</h3> <ul><li><a href="/wiki/Dam" title="Dam">Dam</a></li> <li><a href="/wiki/Drinkware" title="Drinkware">Drinkware</a></li> <li><a href="/wiki/Drip_irrigation" title="Drip irrigation">Drip irrigation</a></li></ul></div><div class="mw-category-group"><h3>E</h3> <ul><li><a href="/wiki/Electrocardiogram" title="Electrocardiogram">Electrocardiogram</a></li> <li><a href="/wiki/Electrolysis" title="Electrolysis">Electrolysis</a></li> <li><a href="/wiki/Elevator" title="Elevator">Elevator</a></li> <li><a href="/wiki/Escalator" title="Escalator">Escalator</a></li></ul></div><div class="mw-category-group"><h3>F</h3> <ul><li><a href="/wiki/Factory_farming" title="Factory farming">Factory farming</a></li> <li><a href="/wiki/Fastener" title="Fastener">Fastener</a></li> <li><a href="/wiki/Fastener_identification_markings" title="Fastener identification markings">Fastener identification markings</a></li> <li><a href="/wiki/Fire_alarm" title="Fire alarm">Fire alarm</a></li> <li><a href="/wiki/Fire_engines" title="Fire engines">Fire engines</a></li> <li><a href="/wiki/Fire_hydrant" title="Fire hydrant">Fire hydrant</a></li> <li><a href="/wiki/Fire_sprinkler" title="Fire sprinkler">Fire sprinkler</a></li> <li><a href="/wiki/Fireproofing" title="Fireproofing">Fireproofing</a></li> <li><a href="/wiki/Folding" title="Folding">Folding</a></li> <li><a href="/wiki/Fountain" title="Fountain">Fountain</a></li> <li><a href="/wiki/Francis-Turbine" title="Francis-Turbine">Francis-Turbine</a></li> <li><a href="/wiki/Fuel_cell" title="Fuel cell">Fuel cell</a></li> <li><a href="/wiki/Furnace" title="Furnace">Furnace</a></li></ul></div><div class="mw-category-group"><h3>G</h3> <ul><li><a href="/wiki/Gamma_60_wind_turbine" title="Gamma 60 wind turbine">Gamma 60 wind turbine</a></li> <li><a href="/wiki/Gare_de_Paris-Est" title="Gare de Paris-Est">Gare de Paris-Est</a></li> <li><a href="/wiki/Geneva_drive" title="Geneva drive">Geneva drive</a></li> <li><a href="/wiki/Glass" title="Glass">Glass</a></li> <li><a href="/wiki/Glass_(vessel)" title="Glass (vessel)">Glass (vessel)</a></li> <li><a href="/wiki/Glasses" title="Glasses">Glasses</a></li> <li><a href="/wiki/Global_Positioning_System" title="Global Positioning System">Global Positioning System</a></li> <li><a href="/wiki/Gr%C3%BCner_Wehr_(weir_in_Marburg)" title="Grüner Wehr (weir in Marburg)">Grüner Wehr (weir in Marburg)</a></li></ul></div><div class="mw-category-group"><h3>H</h3> <ul><li><a href="/wiki/Hearing_aids" title="Hearing aids">Hearing aids</a></li> <li><a href="/wiki/High_dynamic_range_images" title="High dynamic range images">High dynamic range images</a></li> <li><a href="/wiki/Hydroelectric_power" title="Hydroelectric power">Hydroelectric power</a></li> <li><a href="/wiki/Hydroelectric_power_plants_in_Japan" title="Hydroelectric power plants in Japan">Hydroelectric power plants in Japan</a></li></ul></div><div class="mw-category-group"><h3>I</h3> <ul><li><a href="/wiki/Ishikawajima_Ne-20" title="Ishikawajima Ne-20">Ishikawajima Ne-20</a></li></ul></div><div class="mw-category-group"><h3>K</h3> <ul><li><a href="/wiki/Kaplan-Turbine" title="Kaplan-Turbine">Kaplan-Turbine</a></li> <li><a href="/wiki/Keyboard" title="Keyboard">Keyboard</a></li> <li><a href="/wiki/Kupferh%C3%B6fe_in_Stolberg_(Rheinland)" title="Kupferhöfe in Stolberg (Rheinland)">Kupferhöfe in Stolberg (Rheinland)</a></li></ul></div><div class="mw-category-group"><h3>L</h3> <ul><li><a href="/wiki/Laboratory_equipment" title="Laboratory equipment">Laboratory equipment</a></li> <li><a href="/wiki/Laser_pointer" title="Laser pointer">Laser pointer</a></li> <li><a href="/wiki/Laundry_symbols" title="Laundry symbols">Laundry symbols</a></li> <li><a href="/wiki/London_Underground_stations_A-L" title="London Underground stations A-L">London Underground stations A-L</a></li> <li><a href="/wiki/London_Underground_stations_M-Z" title="London Underground stations M-Z">London Underground stations M-Z</a></li></ul></div><div class="mw-category-group"><h3>M</h3> <ul><li><a href="/wiki/M3_half-track" title="M3 half-track">M3 half-track</a></li> <li><a href="/wiki/Magnetic_confinement_fusion_experiments" title="Magnetic confinement fusion experiments">Magnetic confinement fusion experiments</a></li> <li><a href="/wiki/Maltakraftwerke" title="Maltakraftwerke">Maltakraftwerke</a></li> <li><a href="/wiki/Manhole_covers_by_year" title="Manhole covers by year">Manhole covers by year</a></li> <li><a href="/wiki/Match" title="Match">Match</a></li> <li><a href="/wiki/Medical_technology" title="Medical technology">Medical technology</a></li> <li><a href="/wiki/Mojibake" title="Mojibake">Mojibake</a></li> <li><a href="/wiki/Movie_projector" title="Movie projector">Movie projector</a></li> <li><a href="/wiki/Moving_sidewalk" title="Moving sidewalk">Moving sidewalk</a></li></ul></div><div class="mw-category-group"><h3>N</h3> <ul><li><a href="/wiki/Natural_gas" title="Natural gas">Natural gas</a></li> <li><a href="/wiki/Nuclear_energy" title="Nuclear energy">Nuclear energy</a></li> <li><a href="/wiki/Nuclear_power_plant" title="Nuclear power plant">Nuclear power plant</a></li></ul></div><div class="mw-category-group"><h3>P</h3> <ul><li><a href="/wiki/Parking_meter" title="Parking meter">Parking meter</a></li> <li><a href="/wiki/Pelton-Turbine" title="Pelton-Turbine">Pelton-Turbine</a></li> <li><a href="/wiki/Photovoltaic_system" title="Photovoltaic system">Photovoltaic system</a></li> <li><a href="/wiki/Pipe_(material)" title="Pipe (material)">Pipe (material)</a></li> <li><a href="/wiki/Planetarium" title="Planetarium">Planetarium</a></li> <li><a href="/wiki/Pocket_watch" title="Pocket watch">Pocket watch</a></li> <li><a href="/wiki/Pollution_lumineuse" title="Pollution lumineuse">Pollution lumineuse</a></li> <li><a href="/wiki/Power_systems" title="Power systems">Power systems</a></li></ul></div><div class="mw-category-group"><h3>R</h3> <ul><li><a href="/wiki/W%C3%BCrzburg_(radar)" title="Würzburg (radar)">Würzburg (radar)</a></li> <li><a href="/wiki/Radio" title="Radio">Radio</a></li> <li><a href="/wiki/Rope" title="Rope">Rope</a></li> <li><a href="/wiki/Rosetta_mission" title="Rosetta mission">Rosetta mission</a></li></ul></div><div class="mw-category-group"><h3>S</h3> <ul><li><a href="/wiki/Seawind_Ocean_Technology" title="Seawind Ocean Technology">Seawind Ocean Technology</a></li> <li><a href="/wiki/Seven_segment_display" title="Seven segment display">Seven segment display</a></li> <li><a href="/wiki/Sewer" title="Sewer">Sewer</a></li> <li><a href="/wiki/Ships%27_crane" title="Ships' crane">Ships' crane</a></li> <li><a href="/wiki/Smoke_detector" title="Smoke detector">Smoke detector</a></li> <li><a href="/wiki/Snow_cannon" title="Snow cannon">Snow cannon</a></li> <li><a href="/wiki/Solar_panel" title="Solar panel">Solar panel</a></li> <li><a href="/wiki/Speedometer" title="Speedometer">Speedometer</a></li> <li><a href="/wiki/Stellarator" title="Stellarator">Stellarator</a></li> <li><a href="/wiki/Stile" title="Stile">Stile</a></li> <li><a href="/wiki/Sun_heat_collector" title="Sun heat collector">Sun heat collector</a></li> <li><a href="/wiki/Sundials" title="Sundials">Sundials</a></li></ul></div><div class="mw-category-group"><h3>T</h3> <ul><li><a href="/wiki/Tap" title="Tap">Tap</a></li> <li><a href="/wiki/Textile" title="Textile">Textile</a></li> <li><a href="/wiki/Thermal_insulation" title="Thermal insulation">Thermal insulation</a></li> <li><a href="/wiki/Thermal_paper" title="Thermal paper">Thermal paper</a></li> <li><a href="/wiki/Tokamak" title="Tokamak">Tokamak</a></li> <li><a href="/wiki/Topology_(Network)" title="Topology (Network)">Topology (Network)</a></li> <li><a href="/wiki/Treadwheel" title="Treadwheel">Treadwheel</a></li> <li><a href="/wiki/Trig_points_and_benchmarks" title="Trig points and benchmarks">Trig points and benchmarks</a></li></ul></div><div class="mw-category-group"><h3>U</h3> <ul><li><a href="/wiki/Uljanik" title="Uljanik">Uljanik</a></li></ul></div><div class="mw-category-group"><h3>V</h3> <ul><li><a href="/wiki/Vacuum_cleaner" title="Vacuum cleaner">Vacuum cleaner</a></li> <li><a href="/wiki/Voyager_Golden_Record" title="Voyager Golden Record">Voyager Golden Record</a></li></ul></div><div class="mw-category-group"><h3>W</h3> <ul><li><a href="/wiki/Wassymbolen" title="Wassymbolen">Wassymbolen</a></li> <li><a href="/wiki/Wastewater_treatment" title="Wastewater treatment">Wastewater treatment</a></li> <li><a href="/wiki/Watch" title="Watch">Watch</a></li> <li><a href="/wiki/Water_meter" title="Water meter">Water meter</a></li> <li><a href="/wiki/Water_treatment" title="Water treatment">Water treatment</a></li> <li><a href="/wiki/Water_wheel" title="Water wheel">Water wheel</a></li> <li><a href="/wiki/Watermill" title="Watermill">Watermill</a></li> <li><a href="/wiki/Watermills_in_Germany" title="Watermills in Germany">Watermills in Germany</a></li> <li><a href="/wiki/Welding" title="Welding">Welding</a></li> <li><a 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