门窗安装后，出现一头高一头低、扇和框的缝隙不均匀现象，有时存在上宽下窄或下宽上窄的问题。
After door window is installed, appear directly tall the aperture of low, fan and casing is inhomogenous phenomenon, exist sometimes on wide below narrow or below wide on narrow issue.
门窗安装后，出现一头高一头低、扇和框的缝隙不均匀现象，有时存在上宽下窄或下宽上窄的问题。
After door window is installed, appear directly tall the aperture of low, fan and casing is inhomogenous phenomenon, exist sometimes on wide below narrow or below wide on narrow issue.
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