当浸泡时间延长到9天，涂层形貌由片状转化成海绵状，而且介孔结构部分消失。
After soaking for 9 days, the plate-like structure is turned into a sponge-like structure, and the mesopores partially disappear.
瓦片背面均匀地紧贴在轴承孔壁上，使它有很好的承载和散热能力，提高工作可靠性，延长使用寿命。
Tiles evenly close to the back wall of the bearing bore, it has good load-carrying and heat capacity , improve reliability, extend service life.
冲压薄壁M形滚针保持架窗孔形状采用圆弧形空刀槽，可以提高产品质量，延长轴承使用寿命。
Adopting are type run-out of tool during pressing the window shape of thin thickness type M needle roller cage, the product quality can be improved & the bearing life can be extended .
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