所述硬金属轴承表面相对于所述软金属轴承表面的硬度比优选为至少大约1.5，并且优选为小于大约3。
The differential hardness of the hard metal bearing surface to the soft metal bearing surface is preferably at least about 1.5, and is preferably less than about 3.
许多四处飞溅的机油会将金属屑带进轴承表面。
The oil that is splashed around will circulate metal debris to the lubricated bearing surfaces.
许多四处飞溅的机油会将金属屑带进轴承表面。
The oil that is splashed around will circulate metal debris to the lubricated bearing surfaces.
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