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The number of yarn wet snarling per unit length is an important indirect index for the evaluation of yarn residual torque.

纱线单位长度上的湿扭结个数是评价和衡量纱线残余扭矩的一项重要间接指标。

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A developing trend for the high-speed centrifugal compressor is predicted. The non-oil seal will gradually take the place of the wet seal and it will obtain zero leakage of the seal unit.

最后，对高速离心压缩机发展趋势做出了展望，提出无油密封将逐渐取代湿式密封，真正达到密封装置的介质的“零泄漏”。

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