double pipe heat supply system
... 双管供热系统：double pipe heat supply system 双管队道：twin tube tunnel 双股扭合钢筋：twin twisted bars ...
基于102个网页-相关网页
... two pipe drop heating system 双管上分供暖系统 two pipe heating system 双管供热系统 two pipe hot water downfeed system 双管热水上分式供暖系统 ...
基于34个网页-相关网页
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