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Why do automatic door closers close the door slowly, then slam shut on the final few inches?
TSTC automatic door, swing door, sliding door, revolving door, hospital door, door operator, with more safety features which could guarantee people‘s safe .Read more -
Why do automatic gates only open for cars and other large objects, but not people ?
TSTC automatic door, swing door, swing motor, swing gate .Read more -
Why didn't all doors open with bi-direction ?
TSTC swing door, swing door operator, balanced door .Read more -
Why are there no locks on most of hospital doors ?
TSTC hospital door, hermetic sliding door, airtight door, operation room door .Read more -
Why are the front doors of European homes stronger than USA ?
Why are the front doors of European homes stronger than USA ?American houses are often wood construction but Europe built things from stones .Read more