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- QJ305 Pasty Silver-Based brazing flux produced by our factory was certified by relevant experts of Shanghai in March 14, 1991. Then, it was reported and introduced specially by some journalists such as Xin Min Evening Daily, Shanghai Vacuum Journal, Shanghai Science & Technology Daily, Heating and Ventilating Technology of Air Conditioners and Welding Research and Production, and won "recognition award" in " 92 New Technology and New Products...
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