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

ruby hole n. now historical a small hole cut in a piece of ruby, esp. in a watch escapement.

ΚΠ

1767 J. Harrison Princ. Time-keeper 19 In this Time-keeper there is the greatest Care taken to avoid Friction as much as can be, by the Wheels moving on small Pivots, and in Ruby-holes.

1843 C. Holtzapffel Turning & Mech. Manip. I. 173 Ruby holes are also employed for rounding the leads of even-pointed pencils.

1898 Jewelers' Circular 2 Nov. 44/1 The best and quickest way to repair the trouble is to replace the offending jewel holes by good ruby holes, and to set them accurately and firmly.

2002 D. Christianson Timepieces iv. 70/2 As it turned out, the bored-ruby jewel (the ruby-hole jewel) remained a British watch-industry secret for nearly 70 years before it was ‘invented’ on the continent.

单词	ruby hole
释义	> as lemmas ruby hole ruby hole n. now historical a small hole cut in a piece of ruby, esp. in a watch escapement. ΚΠ 1767 J. Harrison Princ. Time-keeper 19 In this Time-keeper there is the greatest Care taken to avoid Friction as much as can be, by the Wheels moving on small Pivots, and in Ruby-holes. 1843 C. Holtzapffel Turning & Mech. Manip. I. 173 Ruby holes are also employed for rounding the leads of even-pointed pencils. 1898 Jewelers' Circular 2 Nov. 44/1 The best and quickest way to repair the trouble is to replace the offending jewel holes by good ruby holes, and to set them accurately and firmly. 2002 D. Christianson Timepieces iv. 70/2 As it turned out, the bored-ruby jewel (the ruby-hole jewel) remained a British watch-industry secret for nearly 70 years before it was ‘invented’ on the continent. extracted from rubyn.¹adj. < as lemmas
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> as lemmas