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单词
welsbach burner
释义
WordReference Random House Unabridged Dictionary of American English © 2024
Wels
′
bach burn′er
(welz
′
bak, -bäk;
Ger.
vels
′
bä
kh
),
USA pronunciation
[
Trademark.
]
Chemistry
a brand of gaslight consisting essentially of a Bunsen burner on which an incombustible mantle (
Wels
′
bach man′tle
) composed of thoria and some ceria becomes brilliantly incandescent when exposed to flame.
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更新时间:2025/11/16 19:39:48