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In order to adapt to the new situation of the group's operation and development, comprehensively improve the comprehensive quality of management personnel, further standardize the signing and performa

Rock drills, also known as wind drills, are metalworking tools that use compressed air for power drilling. Different sizes of pneumatic drills are available for various sizes of drill bits.

The air leg rock drill is a highly efficient rock drilling machine. Air leg rock drill has the advantages of small size, light weight and low gas consumption. The air leg rock drill is widely used in

In order to standardize the unmanned aircraft engaged in operational flight activities and promote the safe, orderly and healthy development of the unmanned aircraft industry, the Civil Aviation Admin

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 education and training cent

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 for the multi rotor