Each hose used for transferring vapors must().
A. have a design burst pressure of at least 25 psig
B. be capable of withstanding at least 2.0 psi vacuum without collapsing or constricting
C. be electrically continuous with a maximum resistance of ten thousand ohms
D. All of the above
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施工项目部在项目分包队伍的安全管理工作包括哪些内容?
包装物料间干燥通风,内、外包装物料(),不得有污染。
A. 一起存放,标识清楚
B. 随便存放
C. 分别存放
D. 以上都可以