以材质划分为：碳钢、铸钢、合金钢、不锈钢、铜、铝合金等。
The material is divided into: carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy.
材质范围：碳钢、合金钢、铜及铜合金、铝及铝合金等。
Material Scope: carbon steel, alloy steel, copper and copper alloy, aluminum and aluminum alloy etc.
材质范围：碳钢、合金钢、铜及铜合金、铝及铝合金等。
Material Scope: carbon steel, alloy steel, copper and copper alloy, aluminum and aluminum alloy etc.
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