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A four-week old warrior robot built in the TRL's engineering services department is one of the mechanical gladiators featured in the new series of Robot Wars starting on BBC2 tomorrow night. The contender, christened Invertebrat by its two builders Peter Bignell and Les Wall, has a spinning serrated wheel at the front to try and disable competitors. The flip-over unit, built in four weeks, did make it through pre-programme trials in October but whether it wins or not you can only find ...

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