山井 meaning in Chinese
yamai
yamanoi
Examples
- Design revision and construction of underground unloading station of meishan iron mine
梅山井下卸矿硐室的设计修改与施工 - Establishment and perfection of ventilation system in underground multistage fan station of dongguashan copper mine
冬瓜山井下多级机站通风系统的建立与完善