hubei mengbangyang new materials co., ltd. can produce 500 tons of trimesoyl chloride, 500 tons of refined fluorene, and refined 2,3-dihydroxynaphthalene (2,3- DON)200 ton, 4,4'-oxybisbenzoic acid di(1 H- benzotriazol-1-yl) ester ( OBA-S-AE)150 tons, 4,4
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