謝謝，你這個是對的。請教一下“then evacuate -pressure hold, add back the us

來源: 於 2023-07-11 17:21:52 [舊帖] [給我悄悄話] 本文已被閱讀：次

then evacuate -pressure hold, add back the used refrigerant,

why Pressure Hold? after evacuate.

Thank you.