HL312银基焊条/HL312银钎焊条/HL312银焊条
HL326银基焊条/HL32..
HL325银基焊条/HL32..
斯米克HL323银基焊条/H..
HL321银基焊条/HL32..
HL313银基焊条/HL31..
HL312银基焊条/HL31..