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GS_1材料(国外称DU 材料)是以钢板为基体,以球形青铜粉为中间层,以填充聚四氟乙烯为摩擦表面层的三层复合材料,见图1。
GS_1 material (foreign material called DU) is a steel substrate, with spherical bronze powder as the middle layer to fill PTFE friction surface layer of the three-layer composite material, shown in Figure 1.