| 单词 | quarter twist |
| 释义 | > as lemmasquarter twist quarter twist n. a twist of 90°, a quarter-turn; frequently attributive, esp. designating a mechanism which imparts motion at a right angle to some other part, as quarter-twist belt, quarter-twist drive, etc. ΚΠ 1800 Carpenters' Rules of Work (Boston) 32 Working a common quarter twist rail and capping the first post [of a stair]. 1859 Sci. Amer. 21 Nov. 329/1 The pulleys from which motion is taken for the heads, which run with quarter-twist belts. 1912 P. A. Amos Processes of Flour Manuf. xx. 166 The driving is obtained..from a central vertical shaft, which..is driven direct, with pulley and quarter-twist drive beneath the floor. 1951 Ann. Missouri Bot. Garden 38 309 This cataphyll and its axillary bud..are turned only one fourth of the way round... If this quarter twist were not put into effect the axillary buds..would point straight up in the air or straight down in the soil. 2003 Wichita (Kansas) Eagle (Nexis) 8 Feb. c1 Remove spent blooms by grabbing the stem with thumb and forefinger, giving it a quarter twist and pulling straight up. < as lemmas |
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