发明授权
US3038911A Fluidity control of fluidized vanadium oxide catalysts in the preparation of phthalic anhydride 失效
流化钒酸酐催化剂在邻苯二甲酸酐制备中的流动控制

Fluidity control of fluidized vanadium oxide catalysts in the preparation of phthalic anhydride
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