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What Is The Blockade?
Sep 19, 2017

The blockade is the Ministry of Railways within the industry to seal the product of a name, Shi: implementation, seal: Seals, closures, locks: locks. In fact, the most popular statement is: one-time lock. 2009, the National Standards Committee to introduce international standards ISO17712 and established national standards, officially named Box seal.

As long as the use of this so-called blockade cannot be opened, only to destroy it can, so it is very widely used places, such as customs, electricity and other people two times to prevent the use of the place can be blocked.  Each blockade has a number so that it is not switched. In short, the blockade is used to prevent other people contact with a disposable lock.