Make sure that all gas fires and central heating boilers are serviced annually.
确保所有的煤气取暖炉和中央供暖锅炉每年都检修一次。
Central heating boilers other than those of heading No. 84.02.
集中供暖用的热水锅炉，但税目84.02的货品除外。
Heating boilers. part 3: gas - fired central heating boilers. assembly comprising a boiler and a forced draught burner.
供暖锅炉。第3部分：燃烧气体的集中供暖锅炉。锅炉和强制送风燃烧器组合设备。
Compares the features of household heating by gas fired boilers and coal fired central heating in applicability and economics.
比较了燃气炉分户供暖与燃煤集中供暖在实用性与经济性方面的特点。
Compares the features of household heating by gas fired boilers and coal fired central heating in applicability and economics.
比较了燃气炉分户供暖与燃煤集中供暖在实用性与经济性方面的特点。
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