An angle grinder, also known as a side grinder or disc grinder, is a handheld power Tool used for grinding (abrasive cutting) and polishing. Although developed originally as tools for rigid abrasive discs, the availability of an interchangeable power source has encouraged their use with a wide variety of cutters and attachments.
Angle grinders can be powered by an electric motor or compressed air. The motor drives a geared head at a right-angle on which is mounted an abrasive disc or a thinner cut-off disc, either of which can be replaced when worn. Angle grinders typically have an adjustable guard and a side-handle for two-handed operation. Certain angle grinders, depending on their speed range, can be used as sanders, employing a sanding disc with a backing pad or disc. The backing system is typically made of hard plastic, phenolic resin, or medium-hard rubber depending on the amount of flexibility desired.
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The rapid development of contemporary communication technology has brought a lot of enjoyment to people. With the development of data communication and multimedia service requirements and the emergence of fourth-generation mobile communications that meet the needs of mobile data, mobile computing and mobile multimedia operations, this fourth-generation mobile communications technology will bring people a better future.
Because of its ultra-high data transmission speed, 4G is hailed as a "high-speed dialogue" between machines by the China Internet of Things school-enterprise alliance. From the point of view of the security monitoring industry, the networked, intelligent, and high-definition monitoring is the goal of the industry's self-pursuit. However, the intelligence of wireless monitoring depends on the development of network technology and high-definition technology. Once network low speed is the bottleneck of the development of wireless monitoring, but now the birth and popularity of 4G networks will be an irreversible trend. The rapid development of 3G and 4G networks has opened up new prospects for security monitoring.
Wireless mobile monitoring is the branch of network monitoring, and the pressure of network transmission is even more prominent. The rise of 4G networks applies the advantages of mobile wireless transmission to the field of mobile monitoring. From the perspective of pilots at that time, the speed of 4G network is 10 times that of 3G network, the download speed is up to 100M, and the upload speed is 20M, while the broadband of general 720P HD monitoring needs is between 2M and 4M. This is an excellent way to meet the outstanding demands of HD surveillance. If the 4G network can be widely used in the country, then the equipment that used to rely on the second and third generations of network transmission will gradually lose the mall. In the future, under the impact of the 4G wave, the upgrading and transformation of the old commodities for security work will be certain.
From the perspective of security work environment, network monitoring has been the major trend of work. However, the market share of internship shopping centers for network monitoring is still low, and people in the industry believe that this is due to the fact that the domestic network environment cannot be maintained. The domestic surveillance HD trend has become even more apparent. Many well-known monitoring equipment manufacturers have now initially introduced higher-clear 700-line cameras, and some manufacturers have even begun to initially introduce millions of pixel cameras. The extensive use of these high-definition monitoring front-ends will place greater stress on the back-end. Therefore, the industry is widely applauded about the arrival of 4G networks. Xiao Bian believes that, compared with 3G, 4G is mainly in the transmission bandwidth, transmission speed has improved a lot, in addition there will be a big break in stability.
At the same time, the application fee of the traffic is also a topic of concern to many people. Since the plans formulated by various operators are not the same, the operational efficiency fee is still high, and the promotion of wireless high-definition surveillance is also difficult. It is understood that the 4G network uses a gradual introduction of the method, in the original 3G based on the technology to upgrade, the cost will naturally reduce a lot. The relevant person indicated that the cost of the 4G network will be lower than the 3G package fee at that time.
Conclusion When the 4G network can handle the problems of wireless monitoring in terms of bandwidth, stability, and traffic expenses, it will have a revolutionary impact on high-definition surveillance. The maturity of 4G network technology will make wireless surveillance even more powerful! 