four-ball tester 四球试验机 ; 四球式试验机
four-ball extreme pressure tester 四球极压试验机
four-ball ep lubricant tester 四球式极压润滑剂试验机
Their Aw property added in water is investigated and the proportion for the compound phosphate ester is optimized by means of four - ball tester.
利用四球试验机考察了添加到水溶液中的抗磨性能，并优化了复合磷酸酯的配比。
Authors reequiped a Four - ball Tester as for contact fatigue tester and carried out a series of tests to study the effect of additives on 45 steel contact fatigue.
作者将四球机改装成接触疲劳试验机，并在其上进行了一系列添加剂对接触疲劳的影响试验研究。
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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