Introduces how to synthesize acrylic acid, acrylate and phenylethene quadripolymer into alcohol-soluble acrylic resin and use it as a link stuff to prepare flexible relief block printing ink.
The fateful year 1870 was near at hand, which was to mark the close of the literary epoch, when quarterlies gave way to monthlies; letter-press to illustration; volumes to pages.
合
醇
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当斯的教育（中）
来， 标
着文学时代
