Dewar vacuum flask
常见例句
- 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。 返回 Dewar vacuum flask