[請問] 冷氣銅管怎麼看
我有google但是還是看不懂
我知道幾分幾分是指管徑的寬度
也知道也知道跟英吋的關係
但是2分 這樣我看得懂
3分這樣我也看得懂
可是冷氣安裝都是寫2分3分 這樣是指3分之2分嗎?
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