Clams also soften the sediment by expelling jets of water from between the valves of their shells.

ECONOMIST: Robots

As Wall Street drooled over new-economy industries, Mr Kozlowski dug into less glamorous work, buying struggling firms in businesses such as pipes and valves, water sprinklers, fire extinguishers, syringes and nappies.

ECONOMIST: Face value

It meant reframing people who are making pipes and valves to being in the water business.

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Salt water damage is even more likely to make pumps and valves inoperable in the short term, causing further melting of the already damaged reactor cores.

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It has a bivalve shell, two strings which move the valves against one another, and a small pump that expels water (he is still working on the best design for the foot).

ECONOMIST: Robots

At any rate, the valves for the discharges that are in use are opened to supply water.

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Hot Springs National Park officials closed the valves to spigots at four public access points, where the 143-degree mineral water normally flows.

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