Dewar flask 杜瓦瓶 ; 杜瓦真空瓶 ; 真空瓶 ; 杜而瓶
Dewar's flask Dewar Dewar's vessel 杜而器
Dewar vacuum flask 杜瓦期瓶 ; 真空瓶
Thermos Dewar Flask 小型宽口保温桶
Dewar r flask 杜瓦瓶
Laboratory Glass Dewar Flask 实验室玻璃杜瓦瓶
How it got here: Scottish chemist and physicist Sir James Dewar invented the vacuum flask Iin 1892 as a way to keep liquid nitrogen from warming up and turning into gas in his lab.
它是如何问世的：1982年苏格兰化学家和物理学家James Dewar爵士发明了保温瓶用以防止实验室中的液氮升温而气化。
A conventional thermos isn't good enough, but a Dewar flask, invented in the 19th century, holds cryogenic fluids like liquid nitrogen at temperatures of -196oc (-321of) for months at a time.
传统的恒温器不够好，但是19世纪发明的Dewar flask一次能保持像液态氮这样的温度在- 1960华氏摄氏度的低温液体好几个月之久。
A suitable device was used instead of the original Dewar flask in the phosphorescence attachment of the spectrophotometer.
在磷光附件中使用了适当的装置以代替原有的杜瓦氏瓶。
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