10- 10 refers to the copper alloy with the brand CuPb 10Sn 10;
SPCC+ 10- 10 means that Jiaxing Gurun takes cold-rolled carbon steel plates and steel belts as the matrix, and sinters the copper alloy layer with the brand of CuPb 10Sn 10 to form a bimetallic composite plate, and then the shaft sleeve made of this plate is punched, coiled and shaped, which is what you call a steel-backed composite bushing.
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