... good electric aluminums ,magnesium and other low melting lamp manufacture ,ironware & electric apparatus , instrument & apparatus ,chemical industry ,Aero-Space ,etc . ... brazing copper,copper alloy and steel with low melting point and good techniacBag-35B34-3631-3331-35//621732730 ... ,copper alloy and steel with low melting point and good technics, the melting point lower than 30silverBag-2839-4129-3131- ...