型号 RF2040VRPB-SC,RF2040VRPB-LMCSC 倍速链 带盖罩 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-SC RF2030VRPA-LMCSC RF2030VRPA-HCPSC RF2030VRPA-SSSC RF2030VR-SC 11.91 8.0 RF2030VRPB-SC RF2030VRPB-LMCSC RF2030VRPB-HCPSC...