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单词
hempel column
释义
hem·pel column
\ˈhempəl-\
noun
Usage:
usually capitalized H
Etymology:
after Walter
Hempel
died 1916 German chemist
:
a vertical column for fractional distillation filled with glass beads and provided with a side tube for exit of the vapors
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更新时间:2025/11/15 22:19:51