SF-2 border, in the middle of frit by ball type powders bronze, the surface rolls the modified polyformaldehyde (POM ), contain the oil storage hole . It is suitable for the normal atmospheric temperature condition and heavily loaded place of low-speed , replaces the traditional copper set, lower costs as well as lengthen service life . The products are applied to car chassis , forging and pressing lathe , metallurgical mining machinery extensively,engineering machinery, water and electricity, steel rolling in fields such as the trade ,etc.

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