用四球试验机试验了这两种含硼表面活性剂的油膜强度。
The experiment results showed the two boracic surfactant can be used as emulsifiers and antiwear additive.
采用四球试验机、光学显微镜、XRD、SEM等分析手段进行了测试与表征。
Typical samples were tested and characterized by four-ball tester, optical microscope, XRD and SEM observation.
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。
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.
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