A.氣井試井 B.穩(wěn)定試井 C.不穩(wěn)定試井 D.干擾試井
A.10mg/m3 B.70mg/m3 C.5mg/m3 D.30mg/m3
A.聲報警 B.光報警 C.聲光報警 D.數(shù)字報警