| 释义 |
preˈheat, v.
[pre- A. 1.]
trans. To heat prior to use or to some other treatment.
1898Engineering Mag. XVI. 245 The gas is usually not preheated, but the gas producers are set close to the furnace, so that the initial heat..is not lost. 1937Discovery May 155/1 The tool having been evenly preheated is transferred to the high heat chamber. 1958Lambermont & Pirie Helicopters & Autogyros 201 The ram-jets are run on propane, which is preheated before being ducted to them. 1958Times 27 Oct. 11/5 Preheat the oven to 420 deg. F. (Regulo 7) and lay the hare directly on the grid. 1975Nature 2 Oct. 368/2 The mixtures were preheated by an external source.
Hence preˈheated ppl. a., preˈheating vbl. n. and ppl. a.; also preˈheater, a device for preheating.
1898Engineering Mag. XVI. 245 This method of pre⁓heating may follow either the regenerative or the recuperative system. 1910Encycl. Brit. I. 445/1 What is called a ‘preheater’ is used to warm up the compressed air before it enters in the motor cylinder. 1911A. Reynolds tr. Dichmann's Basic Open-Hearth Steel Process vii. 59 The second way of producing a steam-air gas with high hydrogen content, consists in the employment of superheated steam, or preheated air supply. 1931Hoffert & Claxton Motor Benzole viii. 221 An efficient preheater should be capable of raising the maximum flow of oil from the temperature at which it leaves the heat-exchange system to a temperature of at least 135°C. 1952Fuchs & Bradley Welding Pract. II. iii. 65 Preheating of the parts being welded is always a help towards crack prevention. 1960Farmer & Stockbreeder 15 Mar. (Suppl.) 11/1 Put the mixture into a greased and floured 6in cake tin and bake in a pre-heated fairly hot oven..for 1 hour. 1967Karch & Buber Offset Processes ii. 20 After one minute in an open preheater press, a reinforcement mat and backing sheet are added. Then the entire assembly is heated and later bonded. 1976Woman's Weekly 6 Nov. 74/1 (Advt.), In this article she looks at pre-heating underblankets. |