主井 meaning in Chinese
[矿物学] main shaft
◇主井井筒 main shaft; 主井提升机 main hoist
Examples
- The main shaft grouting technology in pengzhuang coal mine
彭庄矿井主井注浆技术 - Technology improvement of main mine of tianan no . 4 coal mine
平煤天安四矿主井技术改造 - Reform in the decelerator of major shaft winch
关于主井绞车减速器的改造 - Freezing design of thick overburden in main shaft of xuehu mine
薛湖矿井主井深厚表土冻结设计 - Construction practice of main shaft freezing section of panbei mine
潘北矿主井冻结段施工实践