Manufacturing method of anti-theft door aerial shaft structure that prevents excessive opening

1. The utility model relates to the technical field of anti-theft door overhead shafts, in particular to an anti-theft door overhead shaft structure that prevents excessive opening.

Background technique:

2. At present, the anti-theft door aerial axis lacks a limit device. In daily use, the opening size of the anti-theft door cannot be controlled, which is easy to cause damage to the anti-theft door. Therefore, we propose a kind of anti-theft door anti-theft door that prevents the opening from being too large. shaft structure.

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