The high mining height hydraulic support is designed for the special geologic condition of Shangwan Coal Mine, such as shallow buried depth, thin bed rock and thick aeolian sand.
The paper introduced shallow hole shrinkage stoping method that has been used in Baoziwan Gold Mine for many years.
叙述了堡子湾金矿多年来应用浅孔留矿采矿法的生产实践以及对采切工程的改进。
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For the past 10 years, the REMUS 100 has been one of the most reliable UUVs on the market, making it an easy choice for the Navy to use in shallow water mine counter measure operations.