It includes the division of dissolving area, the redetermination of its length and width,downhill layout of dissolving area a nd improvement of drilling tunnel and cutting grooves.
划
,长、宽重新确定;间下山布置,以及打眼巷、切割槽改进等。
It includes the division of dissolving area, the redetermination of its length and width,downhill layout of dissolving area a nd improvement of drilling tunnel and cutting grooves.
划,长、宽重新确定;间下山布置,以及打眼巷、切割槽改进等。
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