it is provided with synchronous tooth belt for driving and plunger pump for lubricating link knob-type stitch regulator and lever-type reverse feeding mechanism.
上下轴用滚珠轴承支承,同步齿形带传动,柱塞式油泵润滑系统。
it usess cog belt for arm shaft and hook shaft driving, dial typed stitch regulator and reverse feeding lever.