线条锌版活版印刷用的线条或粗网半色调凸版。参阅锌电版。
Zinco a line or coarse screen half-tone block etched on zinc for letterpress printing. see zinc engraving.
采用乙酸乙酯为溶剂，粉状活性炭吸附精制异山梨醇粗品，得出适宜的精制条件，其精制品质量符合USP2 4版质量标。
Using ethyl acetate as solvent, isosorbide can be refined with actived carbon, the suitable condition can be obtained and the product quality meets the quality standard of USP24.
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