1)formation,平整;开拓2)formation,平整;开拓;地层3)formation of land,土地平整;开拓土地4)open up and revise,开拓整和5)land formation,辟拓土地;开拓土地;平整土地6)adit devebopment,平硐开拓
用法和例句
It was considered to be feasible applying natural draft ventilation in small mine applying adit devebopment in mountainous region , in particular environment .