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The concept of disposable locks

Shi blockade is a naming of lead-sealed products within the industry of the Ministry of Railways, Shi: implementation, seal: seal, seal, lock: lock. In fact, the most popular saying is: one-time lock. In 2009, the National Standards Committee introduced the international standard ISO17712 and established the national standard, officially named the box seal. As long as you use this so-called blockade, you can't open it, you can only destroy it, so its application is also very extensive, such...