The design method of damping spring in vibration hammer is developed in this paper. Espacially a selecting range is introduced for calculating damping parameter, which is useful in design.

介绍了振动锤隔振弹簧设计方法给出了隔振参数计算必要的取值范围，可供实际设计参考。

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Meanwhile "Thor" hunk Chris Hemsworth extends his range by swapping his hammer for an axe and almost losing a fight now and then.

CNN: Review: Theron gives new 'Snow White' film some spine

With property at the upper reaches of the price range, celebrity provenance might increase interest but is unlikely to push up the hammer price.

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