NB/T 10776-2021 家用和类似用途低环境温度空气源热泵热水器。英文标题:Low ambient temperature air-source heat pump water heater ...
NB/T 10777-2021 商用或工业用及类似用途低环境温度空气源热泵热水机
NB/T 10777-2021 商用或工业用及类似用途低环境温度空气源热泵热水机。英文标题:Low ambient temperature air-source heat pump water hea...