A.唯一監(jiān)測點(diǎn) B.固定監(jiān)測點(diǎn) C.任一監(jiān)測點(diǎn) D.防爆開關(guān)
A.60% B.70% C.80% D.90%
A.敏感元件 B.轉(zhuǎn)換元件 C.測量電路 D.外接電源