The output of electronic components in China has accounted for nearly 39% of the world. The products with the highest output in the world are: capacitors, resistors, electro-acoustic devices, magnetic materials, piezoelectric quartz crystals, micro-motors, electronic transformers, printed circuit boards. With the expansion of China's electronic information industry, the four major electronic information industry bases in the Pearl River Delta, the Yangtze River Delta, the Bohai Bay region, and some central and western regions have taken shape. The electronic information enterprises in these regions are concentrated, the industrial chain is relatively complete, and they have considerable scale and supporting capabilities. China's electronic materials and components industry has some major problems: the surplus of middle and low-end products, high-end products mainly rely on imports; lack of core technology, low product profits; small scale of enterprises, insufficient investment in technology development. Manual-Telescopic-Mast ,Telescoping Antenna Mast Home Depot,Motorized Telescoping Mast,Retractable Antenna Mast TIANHEMAST , https://www.robomasts.com