Edwards aims to use a newer method called steam-assisted gravity drainage.

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The home-networking method with the most steam behind it is wireless, because it avoids the considerable hassle of running network cable through walls.

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Cooler still is the method the arm deals with waste heat and steam: just like a regular arm, it's allowed to filter up through a permeable skin, producing "sweat" -- the same amount of perspiration you'd get on a warm summer day, according to the team.

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Those who like their truths conveyed in more conventionally rigorous terms will be frustrated by Mr Brody's method, which, though it builds up a head of emotional steam, seems to dodge the final blast of the trumpet for which we feel we have been prepared.

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