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United States Department of Agriculture

Agricultural Research Service

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Image Number D1641-1

Visiting chemist Brajendra Sharma uses a standard four-ball test method to measure friction and wear properties of vegetable-oil-based antiwear additives. The additives can be used in either biodegradable or conventional lubricants and greases.


Photo by Peggy Greb.

640 pixels wide: (d1641-1.jpg)

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Last Modified: 8/12/2016
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