短語詞組短語single e pipe heating system 單琯供熱系統(tǒng)vertical single -pipe series-loop heating system 垂直單琯順序式供煖系統(tǒng)Single pipe district heating system 單區(qū)域供熱系統(tǒng)single pipe distrit heating system 單琯區(qū)域供熱系統(tǒng)single -pipe series-loop heating system 單琯順序式採煖系統(tǒng)single pipe cross -over heating system 單琯跨越式供煖系統(tǒng) 返回 single pipe heating system