A.8°~25° B.8° C.25°~45° D.45°
A.水文地質(zhì)編錄 B.生產(chǎn)采場地質(zhì)編錄 C.采礦工程地質(zhì)編錄 D.生產(chǎn)勘探地質(zhì)編錄
A.2個 B.3個 C.1個 D.4個