Their antiwear and extreme pressure properties in rapeseed oil and water were tested on the four-ball tester.

通过四球试验机考察了它们在菜籽油和水中的抗磨性能与极压性能。

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Their anti-wear and extreme pressure properties in rapeseed base oil and mineral base oil were tested on the four-ball tester.

通过四球试验机考察了它们在菜籽油和矿物油中的抗磨性能与极压性能；

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