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Blending, Subdividing, Filling / No-pressure distillation / Drying, (No-pressure/Vacuum) / Synthesis of chemical reagent and pharmaceutical intermediate / Optical microscope / Liquid chromatography analysis（LC） / Reduction, Nitro compound / Vacuum distillation / Nitration / Acylation / Gas chromatography analysis / Karl Fischer moisture analysis / Specific gravity / Diazotization / Bulk specific gravity / Acetalization / Acid chlorides / Ultraviolet-Visible spectrophotometer(UV-VIS) / Drying capacity / Diazo-coupling reaction / Infrared spectroscopy(IR) / Viscosity / Sulfonation / Halogenate, Thionyl chloride, Sulfuryl chloride etc / Crystallization / Alkylation / Coupling reaction / Fusing point / Etherfication / Coagyulation point / Recrystallization / Esterification / Potentiometric titration / Filtration / Carbonylation / Friedel-Crafts reaction / Cyclization / Ring-Opening reaction / Acid amide /