withdraw the guard 中文意思是什麼
withdraw the guard
解釋
撤回步哨-
Withdraw only the amount of chemical needed for the job in progress. guard it from contamination and return any unused chemical to stores
僅僅取出工作過程中需要量的化學品,及時處理化學品的污染,沒有用完的化學品要歸還到庫房中存放。
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