Guide: Haijie's filter cartridge (multi-fold hurricane filter) is made of polyester fiber filter material, which has durable performance. The filter medium, center rod and end cap are glued together to ensure better sealing of the end cap. Due to its …
For the airport and railway station security inspection equipment, everyone is already accustomed to, but how these instruments work, what specific functions, I am afraid many people may not know. How did the security inspector look through the screen of the security checker to see the prohib…