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Currently, research on the extraction of antioxidants and anti-aging drugs from natural products has attracted widespread attention from domestic and foreign scholars. Considerable research results have been achieved in this field, and based on comprehensive domestic and international research repor

Why use ultrasonic impact gun to eliminate stress?Metal structure parts are generally welded by welding. During the metal filling process, there are residual heights, pits, undercuts and various welding defects at the joints, causing severe stress concentration and a certain welding residue. Pullin

Why use ultrasonic impact gun to eliminate stress?Metal structure parts are generally welded by welding. During the metal filling process, there are residual heights, pits, undercuts and various welding defects at the joints, causing severe stress concentration and a certain welding residue. Pullin

Why use ultrasonic impact gun to eliminate stress?Metal structure parts are generally welded by welding. During the metal filling process, there are residual heights, pits, undercuts and various welding defects at the joints, causing severe stress concentration and a certain welding residue. Pullin