Drilling-resistant safe lock

The utility model relates to a drilling preventing safe lock, which belongs to the technical field of locks for special use. The front part of a connected in series screw (3) arranged at the rear part of a lockset is provided with an alloy head (4). The connected in series screw (3) is integrated wi...

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1. Verfasser: YANGEN,ZHU ZHU
Format: Patent
Sprache:eng
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