A.薄煤層不低于97%,中厚煤層不低于95%,厚煤層不低于93% B.薄煤層不低于75%,中厚煤層不低于65%,厚煤層不低于55% C.薄煤層不低于85%,中厚煤層不低于80%,厚煤層不低于75% D.薄煤層不低于93%,中厚煤層不低于85%,厚煤層不低于80%
A.生產(chǎn)技術(shù) B.地質(zhì)測量 C.計劃勞資 D.組織人事