main trunk line main pipe main pipe line
Ring Main and cross - headers are to be run level.
环形主管道及十 字形 集管应水平敷设。
—— 给力词典精选From the air units, air through the main along the vertical pipe to each layer.
从新风机组送出的新风通过主管道,沿立管送到各层。
—— 给力词典精选Model 07 - S should be installed at the fire sprinkler service connection to the main line.
型号07-S应该安装在连接到主管道的消防喷淋系统处。
—— 给力词典精选Two or more valves can be parallel ( when approved ) to serve a large supply pipe main.
两个以上的阀门可以并连连接 ( 如果得到批准 ) 以服务更大的供水主管道。
—— 给力词典精选The main pipe burst in the severe cold, and the gas has been getting out.
主管道在严寒中冻裂了, 煤气泄漏了出来。
—— 给力词典精选