. 43%0. Dewar vessel has a home temperature bore in step mode. The upper section diameter is 74 mm and the lower section is 140 mm.是什么意思_. 43%0. Dewar vessel has a home temperature bore in step mode. The upper section diameter is 74 mm and the lower section is 140 mm.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句