何岗煤矿主井井筒冻结段双层井壁夹缝注浆封水技术措施

何岗煤矿主井井筒冻结段双层井壁夹缝注浆封水技术措施的英文翻译

基本释义

• The shafe wall frozen double-layers sandwiching mud-grouting water sealing technique measures in Hegang coal mine main shafe