短語詞組短語tubular electric heater 管式電加熱器tubular electrical heater 管式電熱器tubular resistance heater 筒型電阻式加熱器tubular feed heater 管式給水加熱器tubular r heater 管式加熱器evacuated tubular solar heater waters 真空管式太陽熱水器explosion proof tubular electric heater 防爆管狀電加熱器tubular heater exchhanger 管式熱交換器pass tubular heater 單程管式加熱器 返回 tubular heater