Its lubrication properties in water were evaluated using a four-ball machine.
利用四球试验机考察了水溶性抗磨剂在水中的润滑性能。
In addition, the tribological properties of nanocrystalline Pb powders were tested with a four-ball machine.
另外，在四球试验机上考察了铅纳米晶的摩擦学性能。
The tribological behaviors of the synthetic benzotriazole derivatives as additives in liquid paraffin were evaluated with a four-ball machine.
利用四球试验机考察了其在液体石蜡中的最大无卡咬负荷值。
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