Recently, the AOPA Association of the Civil Aviation Administration of China has strictly examined and approved the official certificate of the civil drone pilot vocational educati...

Solar panels (also called solar modules) A plurality of solar cells are assembled in the solar power system and are the most important part of the solar power system. However, the ...

Recently, with the approval of the air traffic control and Meteorology Department of the Staff Department of Jinan base of the air force, it was agreed to set up a flight airspace ...

Recently, Jiangsu Province Agricultural And Rural Hall this year, the second batch of self-operated products of agricultural machinery production enterprises were strictly reviewed...

During the collapse of the bubble, due to the periodic change of the bubble center pressure, the surrounding water flow point has a huge repeated impact, causing mechanical erosion...