齿形/b三角带/13x11880/19501800皮带1900/型a型/1850/18291930

/三维型/19501800/200021001900三角皮带/5v传动带电机1700橡胶/

1650带1700/1900/1750/16801850橡胶//1600h同步2000////19501800