The locking and unlocking principle of stop lock hanging on security hook
Every time we pay for clothes, we often see cashiers unlocking the stop lock hanging on security hook on the clothes. Just lightly place the stop lock hanging on security hook on the release and it will open. At this time, many people will be curious, what principle is used to unlock the stop lock hanging on security hook? Let me tell you the answer below.
1: The locking principle of stop lock...
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