| 释义 |
on stream, advb. phr. and a.
(stress variable)
Also as one word (see below).
[f. on prep. + stream n.]
A. adv. phr. (Usu. as two words.)
a. Of industrial plant and resources, etc.: in or into productive or useful operation.
1930Refiner IX. i. 58/1 The problem which has been most annoying has been one of keeping the unit on stream. 1945H. S. Bell Amer. Petroleum Refining (ed. 3) xvii. 262 For operating on a charge stock which produces more coke a four-case cycle may be used, with ten minutes on-stream, ten minutes for purging and valve changes, and twenty minutes for regeneration of the catalyst. 1952Economist 6 Sept. 584/2 The Vacuum Company's refinery..is expected to come on stream this autumn. 1958Times Rev. Industry May 52/2 This material..will be manufactured at Grangemouth where the plant..is due to come on stream in 1959. 1974Daily Tel. 9 Feb. 15/3 Another eight large brickmaking factories are due on stream this year raising capacity to 8,000 million. 1977N.Z. Jrnl. Agric. Jan. 5/2 The dairy came on stream early in August last year.
b. fig.
1965Economist 30 Oct. 495/1 The responsiveness of Congress to the evolution of public opinion on various questions of social, economic and fiscal change had been retarded unnaturally until 1965 and then suddenly came on stream. 1972Times 14 Mar. (Hotels Suppl.) p. i/8, London had become enormously attractive to young people all over the world..because ‘le mini’, Carnaby Street and the swinging set had come on stream all at more or less the same time.
B. adj. (Written on-stream, onstream.) Productive; done or occurring in the course of normal production.
1938Proc. Amer. Petroleum Inst. XIX. iii. 145/1 The catalyst activity decreases during the on-stream period of the cycle due to the accumulation of carbonaceous deposits. 1945H. S. Bell Amer. Petroleum Refining (ed. 3) xvii. 260 A reduction of on-stream time per cycle has the same effect on a fixed-bed unit as an increase in catalyst-to-oil ratio on a continuous catalytic unit. 1971Physics Bull. June 358/1 The main advantage of on⁓stream analysis is that it obviates the need for tedious sampling and separate analysis of each sample. 1975Petroleum Rev. XXIX. 324/1 Among the advantages claimed for this system are..earlier onstream production when compared with conventional offshore field developments. |