The main pipe, the branch pipe, and the breathing pipe all are hoses.
主管、支管和通气管均为软管。
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。
Gas has been getting out of the main pipe, which burst in the severe cold.
煤气从在严寒中冻裂的主管道中泄漏出来。
Ball valve for opening and closing the main pipe and equipment used media.
球阀主要供开启和关闭管道和设备介质之用。
Ball valve for opening and closing the main pipe and equipment used media.
球阀主要供开启和关闭管道和设备介质之用。
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