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Anonymous users2024-01-24Outdoor anti-theft door locks are the first line of defense for families, so there must be anti-theft locks for entrance doors with high security performance, and it is best to have a non-perforated lock without keyholes, because you are not afraid of forgetting the key, nor afraid of others pranks, and the security performance is also good.
This is still a function to choose.,Which one you think is good is which one is better.。
Then you choose galvanized sheet to do it! Choose a thicker point of material. Galvanized sheet is not afraid of water! >>>More
The national standard door generally has four specifications, the height is 2050mm and 1970mm two heights, the width is 860mm and 960mm, the combination can be *960, the height of 2050mm is the total height of the door frame, if the user's door height is 2070mm, you can buy 2050mm height, you need to leave a margin of about 20mm, it is easier to adjust when installing.
In order to adapt to the detection requirements of different places, different environments and different locations, it is necessary to install a certain number of detectors of various types at the front end of the system, that is, the site that needs to be detected, which is responsible for monitoring any intrusion activities at the site of the protected area. The device used to detect the movement or other actions of the intruder is usually composed of a sensor and a signal processor, the sensor converts the physical quantities such as pressure, vibration, sound, electromagnetic field into an easy-to-process electrical signal, and the signal processing amplifies the voltage and current to make it a suitable signal, and the detector output is generally a passive switching signal. >>>More
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