A、resisting oxidization
B、reducing friction
C、promoting moving speed
D、developing inertia
更多“A lubricant often has to perform many duties in any situation, in addition to its fundamental job of （）.”相关的问题
A、After every trip B、Every 4000 hours C、According to manufacturer’s instructions D、Every time they are shutdown
A、pKa－pH=log[A-]/[HA] B、pH－pKa=log[A-]/[HA] C、pKa－pH=log[A-][HA]/[HA] D、pKa－pH=log[HA]/[A-][HA]
A、Splash lubrication B、Pressure lubrication C、Sight feed lubricators D、Mechanical lubricators
A、I often have a headache B、I have often a headache C、I often have a backache D、I have often a backache
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