The resins were used to turn out millions of helmet liners. 用这类树脂生产了成百万只钢盔内衬。
The rosin modified phenolic resin, a mainly important one among all resins used as bands for offset inks, has the call for printing ink. 松香改性酚醛树脂是平版油墨用连接料树脂的主要代表，也是印刷油墨中用量最大的一类树脂。
