Sync/Linkage lock, the inner and outer locks are opened at the same time, Synchronization lock

synchronization lock
Double doors, iron door on the outside and wooden door on the inside. When pressing the fingerprint, the inside and outside locks are unlocked at the same time. It is very common in Southeast Asia.
The outside lock and the inside lock need to be automatic,sometimes the outside lock is automatic glass door lock,the inner lock is automatic door lock.
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