Ring inner จากตัวเก่ามีขนาดเล็กจึง Designed ให้มีขนาดหนาขึ้นเพื่อป้องกันเกรียวของ carrier
Ring inner of the old small is designed to make it thicker, to prevent torsion of the carrier.
Inner Ring from old town is small, it is Designed to protect the thicker size, torsion of the carrier.
Ring inner from the old is small in size and therefore, there is a thick Designed moved up to prevent carrier.