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。

youdao

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。

youdao