which creates a 50% delay between detection of an intruder and the gates sealing in response,
l#224;m ch#7853;m #273;i 50% qu#225; tr#236;nh ph#225;t hi#7879;n ng#432;#7901;i x#226;m nh#7853;p v#224; c#7917;a s#7869; b#225;o hi#7879;u #273;#243;ng.