The tribological properties and the anti-wear of micron coppers inside greases were investigated by four-ball test.

通过四球试验，考察了软金属微米铜粉在润滑脂中的摩擦学行为和抗磨性。

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The tribological properties and the anti-wear of micron coppers inside greases were investigated by four-ball test.

通过四球试验，考察了微米铜粉在润滑脂中的摩擦学行为和抗磨性。

youdao

The tribological properties and the anti-wear of micron copper powder in greases are investigated by four-ball test.

通过四球试验 ，考察了软金属微米铜粉在润滑脂中的摩擦学行为和抗磨性。

youdao

Apart from Mido's miss, Cole also had an opportunity to score but was unable to get enough control of the loose ball to test Sorensen after being put free following an error from Robert Huth.

BBC: West Ham 0-1 Stoke City

Steven Thomson crossed for Higdon but the striker could not get his foot around the ball enough to test the Rangers goal.

BBC: St Mirren 0-1 Rangers

And it has two promising young bowlers, Saqlain Mushtaq and Shoaib Akhtar (Shoaib is the only cricketer to have bowled Tendulkar first ball in a Test).

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