In the early 1960s, technicians from the West German (Federal Republic of Germany) aviation company D ö nnier discovered that when an aircraft passes through rain clouds at high speed, a shock wave can be generated that can damage the internal components of the aircraft, while the outer shell of the aircraft remains intact. This phenomenon attracted the attention of physicists, and in 1963, the company established a shock wave research laboratory. In 1966, an engineer in the research laboratory accidentally came into contact with a working shock wave target, and his body felt like an electric shock. The learned engineer immediately realized that this was the effect of the shock wave entering the human body. Eisenberg (Professor at the Institute of Surgery at the University of Munich) worked closely with the shock wave effects research team at Downer&Company to finally prove in 1972 that shock waves transmitted through water could crush isolated kidney stones. This success was a milestone in the history of extracorporeal shock wave lithotripsy and opened up a new era in the treatment of urinary tract stones. In 1980, Joss et al. from the Department of Urology at Ludwigo Maximilian University in Munich, West Germany, first used this machine for clinical treatment of kidney stone patients. In 1985, China successfully developed a stone crusher.