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本文在定量构造了机针与上、下弯针之间的动作协调关系基础上，提出了一种精确实用的中、低速包缝机弯针机构综合方法，并给出了工程实例。研究成果对促进我国包缝机产品的计算机辅助设计具有一定的指导意义。
Based on the quantitative coordination between the needle and the upper and lower looper, this paper presents an accurate and practical method for the looper mechanism of middle and low speed overlock sewing machine, and gives an example of the project. The research results have certain guiding significance for promoting computer-aided design of overlock sewing machine products in our country.