bottom coal bunker 井底煤仓
roof of the bottom coal 下组煤顶板
Position of Coal Bottom Road 底板巷位置确定
coal bed bottom 下组煤
coal car with bottom door 底开门煤车
coal content in bottom slag 炉底渣含碳量
Water inrush from the bottom coal layer in mining work faced now is rather serious in Northern China coalfield, which constraints seriously the normal economical benefits.
在我国华北煤矿区，回采工作面煤层底板突水问题相当严重，困扰着煤矿经济效益的正常发挥。
And the Fuzzy-follower is applied in shaft bottom coal conveyor of a medium-sized coal mine and gives good results. Thus, it solves the problem of power balance of double-motor driving system.
该模糊跟随器在某中型煤矿的井下原煤运输系统中进行了实际应用，效果良好，较好地解决了双电机拖动系统的功率平衡问题。
He'd be at home in Buckingham Palace or at the bottom of a coal mine, he said.
“无论在白金汉宫，还是在煤矿坑底，他都很自在吧。”他说。
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