Mechanic at Steam Pump in Electric Power House, circa 1921.jpg
Lewis Hines
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Mechanic at Steam Pump in Electric Power House, circa 1921
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Mechanic at Steam Pump in Electric Power House, circa 1921, Mechanic at Steam Pump in Electric Power House, circa 1921
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1921年頃の電気式発電所の蒸気ポンプのメカニズム
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1921年頃の電気式発電所の蒸気ポンプのメカニック、電気式発電所の蒸気ポンプのメカニック
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mechanic profession alligator wrench clevis box wrench monkey-wrench pipe wrench open-end wrench wrench mechanical advantage allen wrench muscularity