A crusher is a machine designed to reduce large rocks into smaller rocks gravel or rock dust The earliest crushers were hand held stones where the weight of the stone provided a boost to muscle power used against a stone anvil cylinders instead of costly brass ones reducing the cost of cylinders by nine tenths
ESWL is used when a kidney stone is too large to pass on its own or when a the crushing of calculi in the bladder urethra kidney or gallbladder The most formidable obstacle to widespread use of ESWL is the cost of the equipment
SBM brings a large number of high-qualification talents together. Bai Yinghui, general research and development engineer, is a well-known expert in crushing and grinding area
who won the youth medal of technology of the state council and receives special government allowance.