The adjustment process of lead powder ball grinder was introduced.

介绍铅粉球磨机的调试过程。

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It was shown that the particle size distribution of lead powder played an important role in plate porosity, initial capacity and cycle life of the battery.

结果表明：铅粉粒径对极板的孔隙度、成品电池的初始容量、充电接受性和循环寿命有较大影响。

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The FBI has the lead for determining whether a suspicious powder is a dangerous substance, such as a ricin.

WHITEHOUSE: Press Briefing

Sliding glass doors lead out to a side deck and then up a set of stairs to a roof lounge with powder-coated aluminum railings and cedar decking.

WSJ: Building Outside the Box