From 1366 a . d . the to 1386 a . d . the expanded on the the just south gate of south - tang 米,各门原有双扇木门和可上下?动的千斤闸。
For lager size windows the turn and tilt windows can be single sash or double sashes , and tilt windows , swinging doors 对于大尺寸的门窗,平开上悬门窗可设计为单扇,或双扇门窗,及上悬窗,平开门
To be applicable to the industry factory premises warehouse etc , place , can design the single , hand move , dynamoelectric type etc 适用于工业厂房,仓库等场所可设计成单扇、双扇、手动、电动等类型。