合金種類C2600 C2680 C5191 C5210 C7025 化學成份( % ) 銅:68.5~71.5 鋅:餘量銅:64.0~68.0 鋅:餘量銅:餘量錫:5.5~7.0 磷:0.11~0.13 銅:餘量. 錫:7.0~9.0 磷:0.15~0.17 ...
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