單項(xiàng)選擇題硫化氫檢測儀第二級報(bào)警值應(yīng)設(shè)置在安全臨界濃度()。

A.10mg/m3(15ppm)
B.20mg/m3(30ppm)
C.30mg/m3(20ppm)
D.15mg/m3(10ppm)


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