These valves use a screw type valve instead of a simple flap, and they have a pressure regulating mechanism that will vent water to the ground if the intake pressure exceeds a set level.
Peers have traditionally been in favour of allowing hunts to continue, but Monday night's widespread support by MPs for outlawing the traditional country sport means they were under pressure to give ground.
The official said that last year Karzai had authorized ground spraying, but, under pressure from the Europeans, decided to wait.
When Dollar General held its ground it was a sign the selling pressure was drying up.
"He showed his attributes with shots down the ground and put the Australian bowlers under pressure, " Strauss enthused.
You really can't tell from his face, or from the set of his shoulders, or from the way he places his feet on ground, even though must be under pressure.
Emerging market currencies have mostly led the way lower in the overnight session, with the PLN and HUF losing ground against the EUR and ZAR under pressure against the U.S. dollar.
But the MDC leader, Morgan Tsvangirai, resisting pressure from Mr Mbeki, stood his ground and refused to participate.
ECONOMIST: A negotiated end of the power struggle looks far off
Does the administration see the potential for his voice being added to add pressure to the Republicans to give some ground in negotiations today?
But Malloy's outspoken support for new gun control maintained pressure for passage, even as debate ground on in legislature long after similar measures were passed by lawmakers in neighboring New York.
United had a shout for a penalty waved away by referee Calum Murray when Goodwillie went to ground after another run into the box was thwarted under pressure from Saunders.
"The crowd is able to help you when you need it but I don't think the pressure will affect Murray -- the home ground is definitely a boost rather than a burden, " the 34-year-old added.
The superintendent of the Pecos Valley Artesian Conservancy District, Dennis Karnes, can still remember sitting on a well-pipe as a boy and being launched into the duckpond as soon as the farmer opened the valve and natural pressure spewed several thousand gallons a minute of ground water against his legs.
High demand for water amid the heat wave and problems with soil shrinking as the ground warms has resulted in burst pipes and low water pressure in Oklahoma City, prompting officials to issue mandatory water-use restrictions for the first time in at least a decade, according to utilities department spokeswoman Debbie Ragan.
Not just from Washington, but from London and Paris and other key capitals of the world to make sure that pressure is there and is felt very clearly on the ground by the participants.
So he will be under huge pressure from some in his shadow cabinet not to concede the ground of "democratic accountability" to the Conservatives, and risk the ire of most of the popular press.
Moreover, AMD is keeping the pressure on, promising it will win back some of that lost ground this quarter.
At 1-1, Murray, bowing to relentless pressure from the other end, threw in two errors off the ground followed by a double fault to concede the break.
Blues scrum-half Jason Spice then missed an even better opportunity when, under no pressure, he lost control of the ball as he prepared to ground it in the Bath in-goal area.
It extracts oil from the ground using a method called fracking - pumping down a mixture of sand, water and chemicals at high pressure.
In other words, if not for the pressure on Milken to plead, he stood an excellent chance at successfully asserting his innocence on the ground that his methods of doing business were entirely lawful.
Lovingly nicknamed Anna Konda (no explanation necessary), the Norwegian bot was assembled using 20 hydraulic motors powered by a regular fire hose, whose 100 bars of pressure give it enough strength to break through walls and even lift a car right up off the ground.
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