Under the impact of a large hammer, a high signal noise ratio of the force and velocity can be acquired in the high-strain dynamic testing.

高应变动力试桩法采用数吨重锤锤击，同时实测了桩顶的力信号和速度信号，具有很高的信噪比。

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They are among 22 lots which will be put under the hammer at Taunton Racecourse on 25 February.

BBC: Wellington water towers go up for auction

If you don't relish the thought of working in a chip shop, you might be interested in a genuine piece of showbiz memorabilia that is also under the hammer in cyber-space.

BBC: Fish and Chips

All the same, any indictment, even under a technicality to do with perjury, would still be a hammer-blow if it involved Mr Rove.

ECONOMIST: George Bush