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Standard diving dress
A standard diving dress consists of a metallic (copper and brass or bronze) diving helmet, an airline or hose from a surface supplied diving air pump, a canvas diving suit, diving knife and weighted boots. An important part of the equipment is the lead weights, generally on the chest, back and shoes, to counteract the buoyancy of the helmet and diving suit.
This type of diving equipment is also known as ''hard-hat'' or ''copper hat'' equipment, ''heavy gear'' or a ''"John Brown"'' rig, so-called after the British company that built many of the helmets (Siebe Gorman and Heinke). In the United States, the dominant makers were DESCO, Morse, Miller-Dunn and Schräder and it is sometimes known as a "Diver Dan" outfit, from the television show of the same name. It was commonly used for underwater civil engineering, commercial diving, pearl shell diving and naval diving.
==History==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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