煤气从在严寒中冻裂的主管道中泄漏出来。
Welding seam should be numbered according to pipeline medium set, in principle, main pipe prior to branch pipe.焊缝编号应根据管线介质流向进行编号,原则上应先主管后支管。
The flow rate distributor distributes fluids in a main pipe to all holes, or converges fluids from all holes to a main pipe.流量分配管是将主管流体分配到各个孔,或者是流体由各孔汇入主管的流动过程。