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单词 screw collar
释义

> as lemmas

screw collar
screw collar n. a ring or band with a screw thread by which a light bulb or other device may be secured to a fitting.
ΚΠ
1817 Philos. Trans. (Royal Soc.) 107 189 Another tin cylinder..with a similar screw collar at top, forms a case for protecting the bulb when screwed to the under side.
1854 B. Powell Pereira's Lect. Polarized Light (ed. 2) 301 By means of a screw-collar he managed to vary the distance between the first and second compound lens.
2015 Denver Post (Nexis) 16 Feb. 4 c The chandelier's screw collar that holds the chandeliers to the ceiling mount can break causing the chandelier to fall and injure bystanders.
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更新时间:2024/11/11 5:22:24