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This first depends on whether you are a mechanical lock or a fingerprint password lock, if it is a mechanical lock, you can find a locksmith, but it is best to have a 110 public security bureau for the record, if it is a fingerprint password lock, then you have to find the fingerprint password lock manufacturer, the after-sales technician. In general, the after-sales technicians of the textile combination lock manufacturers will help solve it, but the premise is that you have the phone number of their after-sales technicians.
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You can only find a locksmith.
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If the door is not locked, it can be opened with a hard card.
Who really repairs the lock cylinder, basically no one repairs it, because it can't be repaired, it's better to change it.
Make sure you are not using a decoration key, if not, there is a problem with the lock cylinder.
The regular product is: once the householder key is opened, the construction key cannot be used. If it can be used at the same time, it means that the product department is regular, and the meaning of the ABC key has been lost. Claims can be made.