insulation efficiency of heat-supply piping
... insulation distance 绝缘距离；间隔距离 insulation efficiency of heat-supply piping 供热管道保温效率 insulation engineering 绝缘工程 ...
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... 供热管道保温效率 supply piping 供热管道敷设 installation of heating pipeline 供热管道强度计算 supply pipes ...
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