雙磚我指的是cavity,即使不是,也增加thermal mass
你都說了是option/upgrade,就是說絕大多數過去10年的是沒有的。
雙磚我指的是cavity,即使不是,也增加thermal mass
你都說了是option/upgrade,就是說絕大多數過去10年的是沒有的。
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