To install, test, control, service and clean air-conditioning equipment, including ducting, fan coil units, air handling units and ventilating fans.是什么意思_To install, test, control, service and clean air-conditioning equipment, including ducting, fan coil units, air handling units and ventilating fans.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句