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About yanyan

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  1. yanyan

    PBX systems with VoIP

    PBX systems with VoIP VoIP-based PBX systems are better. They can have a limitless number of lines or extensions. The internet protocol also allows multimedia communications. There are many ways to build an IP PBX/PABX system. The two most common are:Start from the ground up. The better and more affordable option for this case is to go for a hosted IP-based PBX system. Upgrade existing legacy (landline) telephone systems. Companies can integrate existing phone numbers and hardware via PBX SIP Trunking. Both methods use an internet connection to improve business telephony. They use ISDN (Integrated Services Digital Network) to process different types of data. Treat both as a data network as opposed to just voice. Hospitality Technology Solutions IP-PBX PBX System
  2. Three leaf roots blower for sewage treatment Roots blower is a necessary core equipment in sewage treatment process, which directly determines its effect and energy consumption. In the process of biological wastewater treatment, roots blower is mainly used to increase oxygen in the aeration tank, promote the growth of aerobic microorganisms, decompose suspended solids, dissolved organic matter, nitrogen and phosphorus and other nutrients in sewage through their metabolism, so as to achieve the purpose of sewage treatment, which is the core equipment of sewage treatment plant. The performance of the fans we use has the most direct impact on the quality and energy consumption of sewage we treat. Because roots blower belongs to constant flow fan, the main parameter of Roots blower working principle is air volume. The output pressure changes with the change of pipeline and load, and the change of air volume is very small. Roots blower is a kind of high-pressure fan. Roots blower is a positive displacement fan. The delivered air volume is proportional to the number of revolutions, and the gas is transported from the suction side to the discharge side. CL Sereis Cone Liquid Ring Vacuum Pump Roots Blowers Roots Vacuum Pump