论文部分内容阅读
开滦矿务局赵各庄矿采用机械方法,对四至七水平井下排水管进行了清洗,获得成功,深受现场的欢迎。
Zhao Kailuan Mine Bureau of Mining Kailuan Mining Machinery adopted four to seven horizontal underground drainage pipe cleaning, success, by the scene of the welcome.