- active residential solar heating system能动式住宅太阳热取暖系统;
- boiler heating surface锅炉受热面;
- background noise level背景噪声级;
- background music背景音乐;
- background investigationn.背景调查;A reference check on the job candidate that can help verify the true identity of the person and possibly confirm his or her empl;
- background check背景核对;
- heating system供暖系统，暖气系统，加热装置;
- heating padn.取暖电毯;
- heating elements加热元件
- heating element发热元件，发热器;
- background informationn.（新闻）相关链接;背景材料，背景资料;
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