There is more value in the value of the face, saying th…

Recently, I believe that your circle of friends often have a gold card appear in your field of view, yes, he is Aoling "Hornet." With its high value, the Olympiad "Bumblebee" has been sitting on many fans before it went public. On September 6, 2019, the value of the China-----

How convenient is the QR code access control?

Under the impact of the Internet wave, with the improvement of people's quality of life and the expansion of urban community size, traditional access control cards are increasingly popular with the public because of “inconvenient carrying”, “card loss” and “securi-----

The scene is super burning! China's largest super-l…

4.5 km! Bottom layer + surface layer! 4 days delivery! China's smartest Very large paver RP1655 Perfect show turned to Shijiazhuang, Hebei Once again, "Xugong speed" is displayed. The maximum paving width is 16.5 meters (end telescopic 18.5 meters) Maximum paving thickness 550-----

Principle of SIP server

The SIP server is the main component of the IP PBX and is responsible for establishing all SIP dian calls in the network. The SIP server is also called a SIP proxy server or a registration server. Normally, the SIP server does not participate in the media processing process. In SIP networks, medi-----

Roots vacuum pump operation method and gap adjustment m…

The characteristics of Roots vacuum pump unit are: 1. There is a certain gap between the rotor and the pump cavity, and there is no contact between the rotor and the rotor, and no oil lubrication is required. 2. The rotor has good geometric symmetry, which can increase the speed, so that a large -----

These communication protocols are commonly used in buil…

With the development of information technology and the entire information industry, building automation is also moving towards integration, intelligence and networking. The basis of large-scale system integration is the communication network, and its technical core reflects system integration and -----

Shandong Provincial Party Committee and Provincial Gove…

Recently, in order to commend advanced and inspiring morale, and vigorously create a strong atmosphere of respecting labor, respecting knowledge, respecting talents, and respecting creation, inspiring talents to carry forward the spirit of patriotic struggle and building a new era of success,-----