The needle valve can be closed through the rotation of a needle stem, 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。
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。
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.
本发明涉及一种缝纫机，该缝纫机具有可驱动以上下运动的针杆，该针杆上可固定缝纫针以用于引导针线。
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