A.10mm B.20mm C.30mm D.50mm
A.1 B.2 C.3 D.4
A.預(yù)留洞口→安裝門窗框→收口→安裝窗扇→安裝五金 B.預(yù)留洞口→安裝門窗框→安裝窗扇→安裝五金→收口 C.預(yù)留洞口→安裝門窗框→安裝窗扇→收口→安裝五金 D.預(yù)留洞口→收口→安裝門窗框→安裝窗扇→安裝五金