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But when air sinks it is heated due to compression, like how a bicycle pump gets hot because the air is being squeezed into a smaller space.

He applies a bicycle pump to the wheels and is off, weaving through traffic of motorcycles and trucks.

He moved his arms up and down and up and down until he looked like a berserk bicycle pump.

The 25-year-old whose husband used a bicycle pump to push air into her uterus, with fatal consequences.

And British industry did answer the call, even as the experts cautioned that these are sophisticated medical devices, not bicycle pumps.