If longer lengths of straight run are available, position the mounting such that 80% of the run is upstream and 20% is downstream.

如果可以弄到更长的垂直导压管，就定位安装座，将其80%上行、20%下行。

youdao

If longer lengths of straight run are available, position the mounting such that 80% of the run is upstream and 20% is downstream.

如果可以弄到更长的垂直导压管，就定位安装座，将其80%上行、20%下行。

youdao