主立管 meaning in English
main riser
Examples
- In vertical to install pipeline if two nearby one in charge ofed to prop up in executive hold a connection thing in going on , in this way , mainly setting up and managing can emerge and expand or shrink vertically between two floors
如果在主管的两个支管的附近个装一个连接物，这样，主立管就可以在两个楼板之间竖直产生膨胀或收缩。