XH型标准皮带宽200(50.8mm)规格齿数形状节径外径WLKX轮毂直径内孔透孔外径档边外径档边内径档边型号18XH18A/B127.34124.55678557-8028-14184F-401418419XH19A/B134.41131.62678557-9028-14693F-401469320XH20A/B141.49138.69678557-9028-15598F-401559821XH21A/B148.56145.77678557-12028-160105F-401610522XH22A/B155.64152.84678557-10028-169112F-4016911223XH23A/B162.70159.91678557-12028-175124F-4017512424XH24A/B169.79166.99678557-12028-183126F-4018312625XH25A/B176.86174.046785