Lever safety valve (Heat Engines, 1913).jpg
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Lever safety valve (Heat Engines, 1913), Lever safety valve., lever arm safety valve
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Lever safety valve (Heat Engines, 1913), Steam boiler safety valves, Scans from 'Heat Engines', 1913
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レバー安全弁(ヒートエンジン、1913)、レバー安全弁、レバーアーム安全弁
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レバー安全弁(1913年)蒸気ボイラー安全弁「熱エンジン」のスキャン
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safety valve steam-heat heat engine steam heat valvular valve safety-related valved lifer lever heatable estrus oestrus piquancy pungency pungent piquant piquantly pungently safety catch safety bicycle safety heating