常見(jiàn)例句雙語(yǔ)例句Self-repair of micron copper powder in greases was investigated by way of friction test and service life of bearing test.通過(guò)四球試驗(yàn)，考察了微米銅粉在潤(rùn)滑脂中的摩擦學(xué)行為和抗磨性。 返回 bearing grease