底部矿层

基本解释 (translations)

underseam

与底部矿层相关的网络例句 [注：此内容来源于网络，仅供参考]

The Tianlu sandstone copper deposits located in the Silurian period stratum that belong to the northern part of north Qilan orogenic belt. The ore bed is hosted in the basal gray green layer of Hanxia Group or the graygreen interbed in the purplish layer.

摘 要：北祁连天鹿砂岩铜矿床产在北祁连造山带北部志留纪地层中，矿层产于旱峡组灰绿色岩层底部或紫红色岩层的灰绿色夹层中，具有稳定的层位特征。