We can see pipes, valves, manufacturers from our windows.
It is only when you approach the oil-and-gas structure that outsize pipes and valves make its bulk apparent.
The transformer issue of Edison's time is not DC's problem today (subsequent development of rectifers and inverters using, first, mercury-arc valves and, later, thyristors provided a means for manipulating DC voltages).
The final result of all the talking and tinkering was a freely breathing, lightly stressed six-cylinder engine of 3.4 litres displacement, with a rigid cast-iron block and an aluminium cylinder head (better for dissipating heat) that incorporated opposed valves in hemispherical combustion chambers, driven by twin overhead camshafts.
The company has already managed to grow heart valves, heart muscles, blood vessels and a human finger joint.
Or the moment when, inching out along an upper yardarm to retrieve a halyard (for he was a signal boy), he saw the engine-room safety valves pump out a column of red-hot steam, and expected to be boiled alive.The life of a boy-sailor on the navy's prize battlecruiser was no cakewalk.
Early the next morning another group of protesters started closing valves and overriding safety devices on a main gas-export pipeline close to the town of Yacuiba.
Radios with their valves and batteries were cumbersome.
Its fingers work the instrument's valves, and it has mechanical lungs and artificial lips.
It turned valves on and off and meddled with the centrifuges, wasting uranium and damaging equipment.
Heart failure refers to the pumping action itself deteriorating, which might be due to a number of conditions, such as high blood pressure, faulty valves or damage left by a heart attack.In this section Wider understanding Progress at last Panda poop power A bug with a gearbox ReprintsSurvival rates for heart-attack patients have improved greatly.
