Fukuda refrigerated trucks , gasoline-powered small refrigerators, and the most economical small gasoline refrigerated …

Dynamic QR code: There are two kinds of literal meanings: one is visual code animation dynamic two-dimensional code, that is, moving two-dimensional code, but this two-dimensional code has been redesigned by technical drawing means, for art two Dimensional code, usually used for media promoti…

Why to adopt intelligent electricity safety management system and how to realize smart monitoring with electricity security?

Many people do not understand why they need to set up a smart electricity safety management system, especially for places where fire alarm systems have alre…

Mobile phones are essential personal belongings that gradually replace the original objects of life, including keys, access control cards, credit cards, tickets, etc. How can NFC technology be used in human life through portable devices?

NF…

0 Preface

Due to the characteristics of expansion, low strength and rheology of weak rock in gypsum mine, when using the room-column method to return to the mining body, in order to strengthen and ensure the stability of the stope, it is often ne…

The Wiegand protocol is an internationally uniform standard and is a communication protocol developed by Motorola. It is suitable for many features of card readers and cards involving access control systems. It comes in many formats, and the standard 26-bit should be the most common format. I…