本文对螺旋压缩型弹簧的强度为模糊变量、应力为随机变量的情况，提出了模糊可靠的设计方法，并给出了计算实例。

This paper presents the fuzzy reliability design of the helical compression spring, on condition that a fuzzy variable strength and a random stress are given.

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弹簧为低应力、油回火、螺旋缠绕在整体钢轴上扭力型弹簧。

Springs shall be low-stress, oil tempered, helical wound, torsion type on continuous shaft, Solid CRS or tubular as required.

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本文介绍了一种中、高速柴油机上使用的螺旋弹簧式组合油环的设计依据、计算方法及结构特点，总结了在120型柴油机上的试验结果。

In this paper, the design basis, calculation method and construction feature of the new type composite oil ring with helical spring used in the medium and high speed diesel engine are described.

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