()is not an advice be observed when samples are taken in tanks containing volatile petroleum products.

A . Filter masks with a combination filter should be brought and used whenever necessary B . Only explosion-proof equipment(marked EEx)should be used C . Avoid breathing petroleum gases,especially if they come from sour crude(smell of rotten eggs) D . so far as possible,take early and substantial action to keep well clear

时间:2022-11-02 15:12:53 所属题库:理货与计量作业题库

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