| 单词 | direct-draft |
| 释义 | > as lemmasdirect-draft So direct vision, vision by unrefracted and unreflected rays; ( direct-vision spectroscope, one in which direct vision is used); also used attributively to designate (a) in Photography, a type of view-finder in which the subject is viewed directly through a lens or sight; (b) in Television, a picture that can be viewed without magnification, or the apparatus for receiving such a picture. direct-draft (attributive), applied to a boiler, etc. from which the hot air and smoke pass off in a single direct flue, instead of circuitously to economize the heat. direct wave or ray, in Radio, the wave that passes from a transmitter to a receiver along the surface of the earth or (distinguished from surface wave) directly through the intervening air.extracted from directadj.adv.< as lemmas |
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