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- old mine pit 老矿井
- The road caved in above the old mine. 旧矿上面的路面下沉了。
- The mine pit caved in, and the workers escaped via the air vent. 矿井里发生了塌方，工人们都从通风口里逃生了。
- More than60 pits in old mining areas are being extended. 老矿区的六十多个矿井正在扩建。
- Ores from the old mine are already smelted,but those from the new mine are not. 旧宝藏的矿石已经制炼过，新宝藏的矿石则否。
- The Long-Gu mine pit development construction fast will impel economy develop of Long-Gu town powerfully. 龙固矿井的开发建设将为龙固镇经济的快速发展起到强有力地推动作用。
- The difficult fault which the hydraulic tows the shearer is always appear that the mine pit production process to tow and some times does not tow. 液压牵引采煤机在矿井生产过程中容易出现时牵时不牵的疑难故障,原因查找困难,处理时间长。
- ABSTRACT：The coal mine hoisting technique is in the mine pit transportation pharynx and larynx equipment, is communicates about the mine pit. 煤矿提升设备是矿井运输中的咽喉设备，是沟通矿井上下的纽带。
- More than 60 pits in old mining areas are being extended. 老矿区的六十多个矿井正在扩建。
- Ores from the old mine are already smelted, but those from the new mine are not. 旧宝藏的矿石已经制炼过，新宝藏的矿石则否。
- Through the applied research of the fuzzy control technology in the mine pit elevator, we mainly explain the design and the application of the mine hoister fuzzy control system. 通过模糊控制技术在矿井提升机中的应用研究，主要阐述了模糊控制系统在矿井提升机制动系统方面和制动系统与调速系统相协调方面的设计与应用。
- Adopting self Propelled tram's ring like track for the haulage from mine pit mouth to mine run bin lead the mine tram to self return,self sliding and self rotating. 矿山井口到原矿仓运输采用自动环形道,使矿车自升、自溜、自回。
- It was an old mining town inhabited by some escapees from City 17. 它是一个老矿场，曾经居住着一些17号城市的逃亡者。"
- The gangue rocky mountain is the mine pit production system constituent,is simultaneously also the coal mine characteristic solid reject source of pollution. 矸石山是矿井生产系统的组成部分,同时又是煤矿特征固体废弃物污染源。
- The old mine is in the books,and the new one is in the language of common people. 旧宝藏在书本中，新宝藏在平民之语言中。
- The old mine is in the books, and the new one is in the language of common people. 旧宝藏在书本中，新宝藏在平民之语言中。
- Copper he obtained via electrolysis from the polluted water of an old mine in Anglesey. 铜是从安格尔西岛一座旧矿场的污水中经过电解获得的。
- Working in mining pits is very hard for miners. 矿工们下到坑井里工作是很辛苦的。
- The mine's management works laboriously, though it is not necesary for them to work in the mining pit. 负责管理矿务的人员虽然不一定要下井，但也很辛苦。
- It is an extraordinary mining pit located 300 kilometers northeast of Yellowknife in Canada. 加拿大耶洛奈夫东北处有有一个奇妙的矿井。
