four ball test rig 四球试验机
four-ball test rig 四球试验机
four-ball test 四球试验
four ball test methods 四球试验法
Four Ball Wear Test 四球磨损测试
four-ball machine test 四球机试验
four-ball load carrying capacity test 四球机负荷能力试验
Two kinds of four ball test methods are discussed. It proved that the rotation speed is the primary factor effected on results.
通过对两种四球试验法的讨论，证明转速是影响试验结果的主要因素。
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。
Four-ball wear test indicated, the borate ester and ZDDP additive are antiwear synergistic, which is much useful in developing low-phosphorus engine oils.
四球长磨实验还表明，该硼酸酯添加剂与ZDDP类添加剂具有优秀的抗磨协同作用，这对研制低磷发动机油具有重要的意义。
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