英语词汇“tit drill”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

tit drill n. now rare a flat-faced drill with a small sharp pyramidal projection in the centre of the cutting face, used to make holes with a flattened bottom; also called teat drill.The projection keeps the drill in place as it cuts.

ΚΠ

1864 Sci. Amer. 9 Apr. 229/2 There is still another kind of drill for peculiar work which is employed by some machinists, though for our own part we see no special virtue in it, for it is troublesome to use and to make, and very liable to break. It is called the tit or center drill.

1924 Pacific Marine Rev. June 347/3 A series of shallow holes are drilled in the steel shaft in the way of bearings, with an expanding tit drill.

1955 C. C. Turner LP-Gas Man's Encycl. Methods & Equipm. 167/2 Teat drill... also called a Tit Drill.

单词	tit drill
释义	> as lemmas tit drill tit drill n. now rare a flat-faced drill with a small sharp pyramidal projection in the centre of the cutting face, used to make holes with a flattened bottom; also called teat drill.The projection keeps the drill in place as it cuts. ΚΠ 1864 Sci. Amer. 9 Apr. 229/2 There is still another kind of drill for peculiar work which is employed by some machinists, though for our own part we see no special virtue in it, for it is troublesome to use and to make, and very liable to break. It is called the tit or center drill. 1924 Pacific Marine Rev. June 347/3 A series of shallow holes are drilled in the steel shaft in the way of bearings, with an expanding tit drill. 1955 C. C. Turner LP-Gas Man's Encycl. Methods & Equipm. 167/2 Teat drill... also called a Tit Drill. extracted from titn.¹ < as lemmas
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