heavy metal ion oil film 厚油膜

heavy metal ion oil heater 重油加热炉

heavy metal ion oil burner 重油喷嘴

heavy metal ion oil fraction 重油馏分

heavy metal ion oil cracking 重油裂化

heavy metal ion resin oil 重质树脂油

heavy metal ion recoil oil 重后座油

heavy metal ion neutral oil 重质中性油

heavy metal ion petroleum oil 重石油