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.
包括溶区的划分，溶区长、宽的重新确定；溶区间的下山布置，以及打眼巷、切割槽的改进等。
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.
包括溶区的划分，溶区长、宽的重新确定；溶区间的下山布置，以及打眼巷、切割槽的改进等。
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