老坑
老坑-
祖母绿色顶级老坑玻璃种翡翠在标准光源D65光源和A光源下显色都能达到极致。
High-grade jadeite jades should use light source A , because it can enhance the color green .
-
金川露天矿东部老坑采场边坡的安全评价
Safety evaluation of old Eastern pit slope in Jinchuan open pit mine
-
他们重新开挖了老中国坑的矿坑。
They reopened a mine , the old China pit .
-
本文总结了湘西金矿老矿山闭坑中充分回收残矿柱资源的实践经验。
Practical experience of residual pillar resources recovery during old workings close period in Xiangxi Gold Mine was summed up in this paper .