【Dr.720 五金博士】英制GR-2 凹面滾花六角凸緣螺栓(全牙/ 三價鉻白鋅+除氫4小時) 〈GRADE 2 HEX FLANGE SCREW SERRATED INDENTED FULLY THREAD (TRIVALENT ZINC+BAKED 4 ...
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