They may be merely additions to existing product lines (the first cigarette with a filter tip, for instance) or improvements to existing products (a new whiter-than-white washing powder).
它们也可能仅仅是在现有的产品上增加了一些东西(比如推出带有过滤嘴的香烟)，或者是对现有的产品做出改良(比如一种能把衣服洗的更白的洗衣粉)。
A disposable non-woolen filter, and a panel type washable coarse aluminum filter are installed in the front panel of return air duct of each room, to trap powder generated, if any.
在每个房间回风管的前面板上安装有一台一次性的非毛织品过滤器，以及一台板式可洗粗铝过滤器，以捕捉收集可能产生的任何粉尘。
While he wanted to filter out the water and continue the experiment, he found that instead of getting hydroxyapatite powder on the filter paper, a film formed on the paper.
当他想过滤掉水继续试验的时候，他发现留在过滤纸上的不是羟基磷灰石粉末，而是形成了一张薄膜。
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