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单词
ester gum
释义
WordReference Random House Unabridged Dictionary of American English © 2024
es
′
ter gum′,
[
Chem.
]
Chemistry
any of several hard resins produced by the esterification of a natural resin, esp. rosin, with a polyhydric alcohol, chiefly glycerol: used in the manufacture of paints, varnishes, and lacquers.
1935–40
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更新时间:2025/7/31 9:17:22