... of gold, silver, copper, lead, tin casting etc, such as stud, safety pin, chain etc.8. Polish irregular acrylic surface ... shiny.Feature:1.Take water (distilled water and pure water) as fuel, economical, environmental protection and obtained easily.2. Strong and ... irregular surface, fuse LED wafer, weld gold & copper as well as metal parts heat-treatment partly.Specification:Model No.BT-350SFPBT ...