A.監(jiān)測監(jiān)控系統(tǒng) B.人員定位系統(tǒng) C.壓風(fēng)自救系統(tǒng) D.排水施救系統(tǒng)
A.10% B.15% C.20% D.25%
A.0.1% B.0.3% C.0.5% D.0.7%