What are the 10 km wireless video surveillance equipment?

In the field of wireless transmission, 10 km is a very common monitoring distance range, so there are many wireless video surveillance products for such a distance. This leads to the user not knowing which device has better transmission performance when selecting the product. So today, Tengyu.......

Manganese ore beneficiation method

(A) manganese oxide ores to the secondary oxide manganese ore deposits mainly weathering, as well as primary and secondary oxide ores some of the deposition and hydrothermal deposits. Manganese ore was mainly hard manganese ore, manganese ore and water, mang.......