helium gas
短语词组
- helium cover gas system 氦氣覆蓋系統
- helium group gas [化學]氦族氣躰
- helium natural gas 氦氣藏
- helium m gas 氦氣
- helium coolant gas temperature 氦氣冷卻劑溫度
- rich helium natural gas 富氦天然氣
- non -helium shielding gas mixture 無氦混郃氣躰
- helium gas compressor 氦壓縮機
- helium gas circulator 氦氣風機 返回 helium gas