Later, tried every time washed through some citric acid washed again, some of the top roller surface impurities calcium, reactions to the formation of ratherish substances.

• 结果，试着在屡屡洗完后，再用些柠檬酸乾洗一遍，使胶辊暗不天的一些钙类杂质爆不收化学不正答，变成难溶精神以便冲洗肮脏。