短语词组短語heavy oil pre -heater 重油預熱器Lube Oil pre -heater 滑油預熱器oil -filled electric heater 充油式電煖器electric oil -gas heater 油氣電加熱器Mini Oil -Filled Heater 小型油熱式安全電熱器hydrogen side oil -seal heater 氫側密封油箱加熱器 返回 oil heater