Finally, the wholecoal quality process control practice was overall described.
并全面论述了该矿全过程煤质控制的实践过程。
2
However, these accidents are most often is the roof accident — the wholecoal mine accidents accounted for about sixty or seventy percent.
然而，这些事故中最为经常发生的是顶板事故——占到整个煤矿事故的百分之六七十左右。
3
This paper discusses the position and important role of local coal mining in wholecoal mining industry, and looks ahead the developing trend of local coal mining.