80公分的管子总长300米，沿着场地埋设，用作加拿大管道系统，允许预装空调设备。
An 80 CMS pipe with a total length of 300m is buried along site, working as a Canadian pipe system that allows pre-conditioned air.
80公分的管子总长300米，沿着场地埋设，用作加拿大管道系统，允许预装空调设备。
An 80 CMS pipe with a total length of 300m is buried along site, working as a Canadian pipe system that allows pre-conditioned air.
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