分析了细纱牵伸过程中影响牵伸力的因素，上胶圈张力状态与成纱质量的关系。
Influence factor on draft force in spinning draft and relation of top apron tension & yarn quality is analyzed.
表把的内部有密封胶圈，密封胶圈与表壳上的柄头管接触，以保证水和潮气不能进入手表的机芯。
Put the table inside the sealing ring, sealing ring and the handle head case tube on contact, in order to ensure the movement of water and moisture can not enter the watch.
在此基础上，设计加工了可变形弹性密封圈，并和普通胶圈进行了对比实验。
On the basis of the above results, a variable elastic rubber sealing ring has been designed and made, and it is compared with ordinary rubber sealing rings.
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