Using two 3 mm in diameter, 5 mm high piezoelectric ceramic column replace flint, can be made into a continuous firing tens of thousands of gas electronic lighter.

用两个直径3毫米、高5毫米的压电陶瓷柱取代普通的火石，可以制成一种可连续打火几万次的气体电子打火机。

youdao

The study on hydrodynamics and mass transfer performance is carried out in a 25 mm diameter continuous countercurrent supercritical fluid extraction spray column.

建立了描述连续逆流超临界流体喷淋萃取塔的流体力学关联式，根据双膜理论，建立了用于计算液相总体积传质系数的质量传递模型。

youdao