small coalpit developing的意思|示意

美 / / 英 / /

小煤矿开发

coalpit water supply 煤田供水
mining of coalpit 煤矿开采
small coalpit 小煤坑
dust concentration of coalpit 煤矿粉尘浓度
administrative depart we are pirates, these data are stolen from youdao for coalmining 行政部门，我们是盗版者，这些数据是从有道偷来用于煤矿开采
coalplex detail coalplex细节
coalport porcelain coalport瓷
Coalport China Museum 中国煤港博物馆
Coalsack Nebula 煤袋星云
Gary Coalson 加里Coalson