The requirements of chemical components, producing technology of negative aluminium foil for electrolyze capacitor are explained.阐述了电解电容器负极用铝箔对化学成分 、 生产工艺技术的要求,生产过程中的质量控制原理及方法.It's just one of those words that'...
He is learning to develop the film negatives.他学洗相片.Color positive emulsions basically perform in the same way that color negatives do.彩色正片的彩色再现过程，基本上和彩色负片相同。Two negatives make an affirmative.两个否定构成肯定.In the past we have ...