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FRICTION UNIT OF FOUR-BALL FRICTION MACHINE
FRICTION UNIT OF FOUR-BALL FRICTION MACHINE
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机译:四球摩擦机的摩擦装置
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摘要
the invention относитс field test for lubricating properties of the oil. purpose изобретени вл етс productivity testing by увеличени of lower balls.the purpose of достигаетс благодар what node
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