采用循环供油方式，降低油耗，性能有了进一步提高，使用方便的底线量确认窗，从外部一眼就能确认底线量，通过左右独立的取线弹簧，可更细致地调节线的松紧。
The machine adopts circularly oli- offerings. little oil-consuming. quantity of base line confirming window. you can confirm the quantity of the base line by exeteri or adjustment of thread, through the right and left self-governed spring as well.
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