vacuum flask nghĩa là gì

Ví dụ về vacuum flask

• Sterile water was provided to each culture by capillary action from a 500 ml vacuum flask.

• The capacity of the vacuum flask industry is being substantially increased and several new firms are entering it.

• Suppose a driver took a vacuum flask to enable him to have a hot meal during the journey.

• He dealt with certain kinds of thermos flasks, and instances could be given of other types of vacuum flask, showing the game that has been played.

• I confess that it is conceivable but not particularly likely that it may contain a soft drink instead, in which case it is no worse than a vacuum flask.

• A typical domestic vacuum flask will keep liquid cool for about 24 hours and warm for up to 8.

• The insulation of the vacuum flask results in a very slow boil and thus the contents remain liquid for long periods without refrigeration equipment.

• An early 1919 high-altitude oxygen system used a vacuum flask of liquid oxygen to supply two people for one hour at.