panel development
... 盘区开采系统 panel system 盘区开拓 panel development 盘式卸载车 pan-type car ...
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四台矿在开拓14号层404东部盘区过程中，盘区巷道所穿位置地质构造极其复杂，给盘区巷道的掘进带来了极大的困难。
In the course of carving out NO. 14 coalbed 404 of the east area in Sitai mine, it brings a lot of difficulties during digging that geologic structure is very complex in area of digging.
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