For practical purpose, the predetermined effect can be achieved by the application of microcomputer aided design to tunnelwork designs.
本文从实用出发，把微机辅助设计方法应用于平巷掘进的瀑破设计之中，收到了预期的效果。
2
When the power machines of wind-tunnelwork such as alternating-current machine governor and direct-current machine governor and relay, they will bring about strong interference.
风洞中交流电机调速器、直流电机调速器及继电器等动力设备运行时将产生强干扰。
3
They're worried the tunnel construction could damage the site and get in the way of their work.