主井井筒 meaning in English
main shaft
Examples
- Quality rapid construction of main mine shaft in xuandong no . 2 mine
宣东二矿主井井筒优质快速施工 - Quick construction of main shaft wall in base rock period in hu xi coal mine
湖西矿主井井筒基岩段快速施工 - Method of main shaft wall construction expansion clay in lu xi coal mine
鲁西煤矿主井井筒施工膨胀性粘土段措施 - Practices on rapid construction of freezing section in mine main shaft of panbei mine
潘北煤矿主井井筒冻结段快速施工实践 - Outer wall failure treatment for ground freezing section of mine main shaft in getting mine
葛亭煤矿主井井筒冻结段外壁破坏治理