Steel rail has 3 rail base defects: bottom defect, scab and bottom crack.
钢轨轨底缺陷有三种：底伤、结疤和底裂缺陷。
Germany famous brand hardware parts and upper rail and bottom runner design ensure smooth operation.
采用德国名牌折叠门专用五金件，上滑轨下滑槽结构，保证了折叠推拉顺畅、开启灵活。
The model number can be found on the bottom rail.
产品型号位于围栏底部。
The model number can be found on the bottom rail.
产品型号位于围栏底部。
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