three throw switch

用法例句

Sandaocha gold deposit was a reproduced deposit,which occurred in Jiapigou granite green stone belt based on the summarizing the geological and occurring characteristic of the ore deposit,summarizing the way to choose the pre prospecting targets,and the in prospecting working method,and post prospecting studing.

三道岔金矿床是产于夹皮沟花岗岩 -绿岩带内的再生金矿床 ,在总结该矿床的地质特征、矿床产出特点的基础上 ,进而总结了三道岔地区在勘探前如何选择找矿靶位、勘探中如何选择工作手段、工作方法以及勘探后怎样进行地质研究和规律总结 ,并指出了矿床勘查过程中存在的问题。

If symmetrical turnout or three-way turnout can be adopted in urban rail transmit,by which the construction investment can be reduced largely.

如能在城轨交通轨道工程设计中使用对称道岔或三开道岔,可达到大幅度节省轨道工程投资之目的。