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সাইটের অন্য পাতায় এই শব্দগুলো

• A surgeon can open a heart, replace a valve and close it again, and a machine can photograph the inside of a living body without cutting it.

  Wonders of Modern Science →

• In a four-stroke engine it turns at half that speed — each valve needs to open once for every two turns of the crank, which is why the timing belt's pulleys are of different sizes.

  camshaft — dictionary →

• In a petrol engine the throttle is a valve that opens or chokes the flow of air — the name means to choke — and the fuel is metered to follow the air. That is why a blocked air filter feels like a loss of power.

  throttle lever — dictionary →

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