The biggest push concerns small coal mines, in which thousands of workers perish every year.
最大的推动力是关于小煤窑的，每年有几千人因它死亡。
After the impoundment of Xiaolangdi Reservoir, the water of small coal mines threatened Xin an coal mine.
小浪底水库蓄水后，淹没区内小煤窑充水对新安煤矿形成较大危害。
Thisprotector is compact, small and cheap and is an ideal safety apparatus for the power sup-ply network of local small coal mines.
装置具有结构紧凑、体积小、价格便宜等特点，是乡镇小型煤矿供电网络较理想的安全装备。
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