The chamber blasting engineering of quarry in Wushan Copper Mine is accomplished by interval blocking, section millisecond blasting in one charging lane, under the complicated geological, topographical and environmental conditions, adopting various blasting parameters such as n value in accordance with topography and range of blasted muckpile.

Transcatheter closure of perimembranous ventricular septal defect with amplatzer ventricular septal occluder;

Practice of preventing tundish nozzle clogging for ship-building plate casting;