main haulage roadway, main haulageway
main haulage roadway, main haulageway
[煤炭科技英汉词典]
main haulage roadway, main haulageway运输大巷
为整个开采水平或阶段运输服务的水平巷道。
是什么意思,main haulage roadway, main haulageway的解释,main haulage roadway, main haulageway的翻译
main haulage roadway, main haulageway
[煤炭科技英汉词典]
main haulage roadway, main haulageway是什么意思,main haulage roadway, main haulageway的解释,main haulage roadway, main haulageway的翻译