These are the rather ordinary steel bars that are used to reinforce concrete and masonry structures in construction projects.

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At the same time, my brain was adjusting to the mildly surreal sight of an ordinary conference room repurposed for the season with whirring, sloshing stainless steel machinery.

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"The carbon fibre reinforced plastic parts are at least 30% lighter than aluminium and 50% lighter than steel for identical component use, so the vehicle weighs 300kg less than an ordinary vehicle, " Mr Bauman explains.

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