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Share hotel security equipment / security eqpt

Share hotel security equipment
Share hotel security equipment

I have lived in China almost all my life and often go to other places far away from home. I am always worried about the safety of my hotel, but I use these tools in my spare time. One is that the price is not worth it, and the other is that the things are too heavy.

University

TUST

TUST
Tianjin, China

jiaming feng,
Tianjin Univ. of Science&Technology