这些滚轮包可以让你更方便地在机场拖着你的杂物，它的词源可以追溯到600多年前。
These roller bags that make it easier to lug your junk around airports are in keeping with etymology stretching back more than 600 years.
讨论了钢包、中间包及连铸结晶器所用渣相对夹杂物的吸附，对钢水的氧化，以及保护浇注的效果。
Absorption of inclusions to slag, steel reoxidation by slag, and protective effect of the slag at ladle, continuous tundish and nold are discussed.
通过工业试验研究了中间包内安装石灰过滤器后钢液中夹杂物的行为。
The inclusion behavior in the tundish with a lime filter was investigated through the industrial trials.
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