draw-off cock 中文意思是什麼
draw-off cock
解釋
放出開關-
50 gallon distilled water storage tank of stainless steel construction for counter mounting with removable cover inlet and overfow fittings, guage glass and draw off cock
50加侖蒸餾水不銹鋼儲存箱為逆架置以可移動的蓋子入口和溢出配件,測量玻璃和排水龍頭。
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