- prefabricated pipe conduit system
- 预制: prefabricate; precut
- 管道: pipeline; channel; tunnel; p ...
- 系统: system
- 管道，管道系统: tubing
- 管道系统: conduit system; duct system; ducting; ductwork; lacunar canal system; pipage; pipe network; pipe system; pipe-in system; pipeline system; pipework; piping system; plumbing system; trunking system; tubing
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