| 单词 |
pulser |
| 释义 |
pulser|ˈpʌlsə(r)|
[f. pulse n.1 or v. + -er1.]
1. A device that generates electrical pulses.
1947Lebacqz & White in L. N. Ridenour Radar System Engin. x. 373 Successful hard-tube pulsers have been made with power outputs up to 3 or 4 Mw. 1973Sci. Amer. June 47/1 The resolution time, or fastest shutter time, of this type of gate is determined by the shortest duration provided by an electrical voltage pulser: about a nanosecond. 1978Ibid. Mar. 58/3 The base houses..a dial pulser to signal the required numbers to the central office and a bell to signal an incoming call to the subscriber.
2. A machine for producing mechanical pulsation in a liquid.
1954R. Stephenson Introd. Nuclear Engin. ix. 334 Until satisfactory pulsers are developed..it is doubtful that pulse columns will find any extensive use except for very special solvent extraction operations. 1963J. H. Perry Chem. Engineers' Handbk. (ed. 4) xxi. 33/1 The pipe connecting column and pulser may be of any length.., but high pressure drop in the transfer pipe contributes to cavitation difficulties. |
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