型号 RF2030VRPA 倍速链 节距mm塑料滚子钢制滚子滚子直径mm内链节内宽mm 标准规格Lambda规格硬化铬镀规格不锈钢规格 19.05 RF2030VRPA RF2030VRPA-LMC RF2030VRPA-HCP RF2030VRPA-SS RF2030VR 11.91 8.0 RF2030VRPB RF2030VRPB-LMC RF2030VRPB-HCP RF2030VRPB-SS --- RF2030VRPC RF2030VRPC-LMC RF...