At the same time, the turn-around ring of the hammer head is made of special composite material, with the qualities of wear-resisting, self - lubricating, non-maintaining, easy changing etc.
同时锤头回转圈采用特殊复合材料，具有耐磨、自润滑、免维护、易更换等特点。
Adopting the method of the solid-liquid composite casting, the new type anti-impact and anti-wear hammer head, in witch the soft material and hard material are alternately arranged, were made.
采用固-液复合铸造的方法，制造出一种软硬材料相间、抗冲击及耐磨性能高的复合锤头。
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