金属镀金工艺之一。即金属镀金工序完成后,为使金属金光闪烁、富丽明亮而进行的一道工艺。先用黑土矾加水烧沸,配成混合液盛在盘中。然后将块状铜、银金属浸入熔液中烧沸。当镀件色彩比原来之色趋暗时,将镀件、铜.银一并捞出。过滤液体.去除渣滓,加入白盐后再将其在强火上烧开,再将镀件、铜块和银块一并浸入熔液。
我想带你去教堂,让你步上红毯,嫁给你我的梦中情人。
I'd like to take you to the church, so you can walk down that aisle and marry the man of our dreams.
事实上红矮星也很常见,天文学家认为它们是星系中最常见的星体。
Red dwarfs are also common -in fact, astronomers say they are the most common type of star in the galaxy.
事实上红矮星也很常见,天文学家认为它们是星系中最常见的星体。
Red dwarfs are also common - in fact, astronomers say they are the most common type of star in the galaxy.
应用推荐