four-ball machine是什么意思

网络释义

用法例句

An adjustable-speed four-ball machine was used to test the steel ball wear spot diameter variation laws under different load conditions and rotational speeds.

利用可调速四球机测试血液在不同转速及不同载荷条件下钢球平均磨痕直径的变化规律。

It is established a test method evaluating anti-wear property of automatic transmission fluid(ATF)by four-ball tester,this method has excellent repeatability and distinguishability,and the correlation degrees with Vickes pump R2= 0.

在四球试验机上建立了一种评价自动传动液(ATF)抗磨损性能的试验方法,该方法具有较好的重复性和区分性,与Vickes泵的相关度R2=0·80。