4399免费视频

利用電能(neng)、太陽能(neng)、生物質能(neng)、地(di)熱(re)(re)能(neng)、水（地(di)）源(yuan)熱(re)(re)泵、空氣源(yuan)熱(re)(re)泵提(ti)供(gong)(gong)(gong)供(gong)(gong)(gong)熱(re)(re)、供(gong)(gong)(gong)冷服(fu)務;供(gong)(gong)(gong)熱(re)(re)、供(gong)(gong)(gong)冷工(gong)(gong)程(cheng)的(de)(de)(de)設(she)計、施工(gong)(gong)、運行的(de)(de)(de)管理(li)和維護；供(gong)(gong)(gong)熱(re)(re)、供(gong)(gong)(gong)冷技術(shu)(shu)咨詢、技術(shu)(shu)服(fu)務；制冷制熱(re)(re)設(she)備及配件的(de)(de)(de)銷售；合同能(neng)源(yuan)管理(li)、余(yu)熱(re)(re)回收利用、建筑節(jie)能(neng)工(gong)(gong)程(cheng)施工(gong)(gong)；機械設(she)備的(de)(de)(de)節(jie)能(neng)技術(shu)(shu)改造。（依法須經(jing)批準(zhun)的(de)(de)(de)項目，經(jing)相關部(bu)門批準(zhun)后(hou)方(fang)可開(kai)展經(jing)營活動(dong)）