stage spinning

The effects of the jet stretch ratio and draw ratios of three-stage drawing including air drawing, DMF bath drawing, hot water and boiling water drawing and dry-hot drawing on the properties of PAN fiber were studied in dry-jet wet spinning.

研究了干-喷湿纺聚丙烯腈（PAN）初生纤维的喷丝头拉伸比和三级拉伸（空气拉伸、DMF浴拉伸、热水和沸水拉伸、干热拉伸）工艺中各拉伸比对纤维性能的影响。

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Collection dyes an integral whole restoring combing, spinning, weaving to arrange Yu to stage.

集条染复精梳, 纺纱 、 织造到后期整理于一体.

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Fourth, players mainly participating in clay court competitions should pay attention to the stability of serving by adding spinning and serving angle in order to lay a foundation for attacking and the locked stage, improving players' defending ability.

4参加红土地比赛为主的运动员，在平时的训练中应增加第一发球的旋转和角度增加发球的稳定性为发球后的抢攻和相持阶段奠定基础，提高运动员的相持和防守能力。

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