Strong yarns require considerable twist. However, beyond an optimum point additional twist will cause yarns to kink and finally to lose strength.
高强度的纱线要求有相当大的捻度，但是超过最佳捻度后，附加的捻度会使纱线扭结，最终降低纱线的强力。
The experimental results show that, with the increase of adsorption time and desorption time, the product purity increases rapidly, and then decreases, including a optimum point;
实验结果表明：随着吸附时间和解吸时间的增加，产品气纯度先升高后下降，存在一个最佳的吸附时间和解吸时间；
The experimental results show that, with the increase of adsorption time and desorption time, the product purity increases rapidly, and then decreases, including a optimum point;
实验结果表明：随着吸附时间和解吸时间的增加，产品气纯度先升高后下降，存在一个最佳的吸附时间和解吸时间；
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