The ground spring is a hydraulic door closer, but the device that compresses the spring is a worm gear rather than a rack and pinion.
The ground spring of door spring is a hydraulic door closer, but the device that compresses the spring is a worm gear rather than a rack and pinion. For many glass doors, the biggest feature is beauty and atmosphere. It is a very important configuration in many hotels, hotels and some public places. The overall grandeur and atmosphere of glass doors give people a very fashionable and luxurious feeling.
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