In particular it optimizes the parameters of the extension spring that is a crucial part in such a flexible infinitely variable-diameter system.

特别是对超声检测柔性无级变径系统的重要部件拉伸弹簧进行了参数优化，对超声变径检测装置的设计具有重要指导意义。

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A TWSME extension spring, which can extend upon heating and contract upon cooling was obtained using constrained annealing and thermo-mechanical training, the elongation can reach 60%.

首次利用约束热处理结合热机械训练获得了加热伸长、冷却收缩的双向记忆效应弹簧，其伸长率达60%。

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Professional production of extension spring, compression spring, retainer, torsion, flat springs, scroll spring, battery spring, shaped spring, oil seal springs, automobile springs and so on;

专业生产各种拉簧、压簧、卡簧、扭簧、扁弹簧、涡卷弹簧、电池簧、异形簧、油封弹簧、汽车弹簧等各种弹簧产品；

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The Wednesday-night series joins ABC's freshman aliens-next-door comedy "The Neighbors" in getting an extension into spring, and returning drama "Scandal" receiving a full ride.

CNN: 'Nashville' gets full season, yee-haw

They believe the runway extension could be in use by spring 2014.

BBC: Birmingham Airport runway extension work starts

It warns, however, that values may have merely received a boost from the spring season (home values typically have their best stretch as the weather warms) and the extension of the first-time-buyer tax credit that expired last month.

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