“double、acting”的英文意思_释义_用法

单词

double-acting

释义

double-acting, ppl. a.
Acting in two ways or directions, by two methods, etc.: spec. of a steam-engine, worked by application of steam power on both sides of the piston. (Cf. double action s.v. double a. 6.)
1842Penny Cycl. XXII. 475 The upward stroke of the piston was now produced by admitting the steam below it..thus the engine became double-acting.1850Chubb Locks & Keys 28 Chubb's detector being combined with the six double-acting tumblers, added very greatly to the security of the lock.1874Knight Dict. Mech., Double-acting Pump, one which throws water at each stroke.1892T. R. Lounsbury Stud. Chaucer I. ii. 155 The assumed relationship..had begun to perform its double-acting part.

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