| 摘要 |
Brazing flux for brass and bronze and for copper and phosphor solder, and for low-silver and phosphor solder, characterized in that it includes: KF.2H20 26-43% per weight, H3BO3 25-42% per weight, 1.5-5% LiF, 0.1-0.3% CaF2 per weight, sodium polyphosphate 5-10% per weight, and the remainder is made up by distilled water.
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