引用:
原帖由 andy53120569 於 5-1-2009 23:38 發表 
我仲聽過12氣同22氣..
尼兩種氣相等而家既咩氣??
點解會叫12同22?
壓力既單位??
其實12 和 22都是"雪種"的名稱而不是什麽壓力既單位:
12: Dichlorodifluoromethane (R-12), usually sold under the brand name Freon-12, is a chlorofluorocarbon halomethane,
22: Chlorodifluoromethane or difluoromonochloromethane is a hydrochlorofluorocarbon (HCFC). It is better known under its code names of HCFC-22, R-22, Genetron 22 or Freon 22,
但因為含有破壞大氣層的物質所以停用了.
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本帖最後由 Steady 於 7-1-2009 07:03 編輯 ]
