| 单词 | sighting-tube |
| 释义 | > as lemmassighting-tube sighting-tube n. ΚΠ 1946 Nature 12 Oct. 518/2 Radiation from a 5 sq. mm. area of tyre falls on to the cell via an arrangement which comprises a water-cooled copper sighting-tube and a rotating slotted disk which serves as the radiation chopper. 1958 J. Needham in Aspects of Translation 86 And there are holes which take the place of the sighting-tube for looking up (at the heavenly bodies). < as lemmas |
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