For fiber, researches both theoretical and experimental, have been done on polymer airdrawing mechanism, and for web only experimental researches have been done.
他们针对纤维进行了聚合物拉伸机理的理论研究和相应的实验研究，而针对纤网只进行了有关的实验研究。
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Based on the experiment, a mathematical model between the quantity of airdrawing and the diameter of auxiliary pipe for the tapered t branch has been established.
The paper Outlines the construction features, the drawing principle, the fix of the airdrawing jet nozzle, and the fix methods and the maintenance of the air cavity in the nozzle.