The needle valve can be closed through the rotation of a needlestem, and the oil cleaning device can also be driven to lift to clean out carbon deposit in the nozzle.
通过针阀杆的旋转即可以关闭针阀 又可以带动清油器升降，清除喷嘴中的积碳。
2
Clearing occurs as the held loop slips off the latch and onto the stem as the needle moves upwards.
在针向上运动时，被握持的线圈从针舌上滑到针杆上，为退圈。
3
This invention discloses a sewing machine having stem to be driven to perform longitudinal movement; wherein the stem can be fixed with sewing needle for guiding threads.