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Security of the big words: application of the access control system and analysis of the principle of magnetic door ( 2019-08-28 )

The working principle of door magnetic sensor and the application of door magnetic system in smart home ( 2019-08-28 )

Major breakthroughs in aerospace science and technology new liquid surface intelligent monitors can replace imports ( 2019-08-28 )

Emerson Rosemount 2-in-1 Radar Level Gauge Wins Safety Technology Award ( 2019-08-28 )

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