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wqwang2000(½ð±Ò+3, ·­ÒëEPI+1): 2011-02-23 16:12:51
By adding boric acid in the medium phase of phenolic resins synthesis, a boron containing phenolic resin which meets the  standard of phenolic resin as a friction material, is synthesized.
2Â¥2011-02-23 13:06:11
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