40PTIANYU，60PTIANYU，40PTIANYU，60PTIANYU，TIANYU40P，TIANYU60P，TIANYU40P，TIANYU60P12.7mm节距链条19.05mm节距塑料链条15.875mm节距塑胶链条RS40P双排塑料链条RS60P双排塑胶链条TSUBAKI50SSJAPAN链条详情请致电;021-31395915021-31395916手机18939759409)