单词	piston
释义	pistonpis‧ton /ˈpɪstən/ noun [countable] Word Origin WORD ORIGINpiston Origin: 1700-1800 French, Italian pistone ‘large stick for crushing’, from pistare ‘to crush’ Examples EXAMPLES FROM THE CORPUS But as the barrel swung it would push a small piston that, in return, moved the hand lever. Controlled by computer and battery-powered hydraulics, they push or pull like pistons to damp movement by the walls. He used a cane and tried to walk fast and his hips bobbed like pistons gone awry. Here, the float arm closes a horizontal piston, fitted with a washer against the valve seating. It consists of an upright cylinder containing a twelve-inch piston with rod two and a half inches in diameter. Some of their multi-cylinder motor cycle engines have pistons little bigger than thimbles. The steel piston is fitted with brass piston rings which, says Hytek, makes for longer life. This is a wonderful piece of ancient machinery of indeterminate age, and consists of a crank-driven triple piston pump. word sets WORD SETS► Engineering boiler, nouncamshaft, nounchuck, nouncollar, nounconsole, nouncylinder, noundecompress, verbdiggings, noundrag, nounengagement, nounengine, nounengineer, nounengineer, verbexhaust, nounhydraulics, nounlubricant, nounlubricate, verbmetal fatigue, nounperformance, nounpipe fitter, nounpipeline, nounpiston, nounplunger, nounregulator, nounrig, nounrivet, verbrotary, adjectivesafety valve, nounseparator, nounshaft, nounshockproof, adjectivesparking plug, nounspark plug, nounspindle, nounstarter, nounstreamline, verbtheodolite, nountorsion, nountruss, nountune, verbtune-up, nountunnel, verbturboprop, nounwind tunnel, noun Collocations COLLOCATIONS FROM THE CORPUSNOUN► engine · These resemble crop-sprayers, but with piston engines - hence the avgas there.· A piston engine reacts immediately to power, just like a car.· All light aircraft maintenance workshops would most certainly have one for synchronizing and timing port and starboard magnetos on piston engines.· After a piston engine, starting a turbine can seem strange. ► ring · Pardue's aircraft had metal on the oil filter screens as well as part of a piston ring. a part of an engine consisting of a short solid piece of metal inside a tube, which moves up and down to make the other parts of the engine move
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