Door design consideration mainly as below:1, Where the building and inner door located2, Where the interior door located3, Number of times a door opens and closes Main concern points for this configuration are:1, user-friendly2, Security Door opening & closing description:Push or pull to opening the

Floor spring installation is not a simple job.It should be done by the skilled persons.Wrongly installation may cause noice,oil leaking or speed problems.The steps are as below:1.Choose the suitable floor spring according to the door weight and width.2.Decide the ground digging hole position and si