pocket ionization chamber

例句：

1. 1.The pocket ionization chamber is used to measure the concentration of gases in a small volume of air.
   口袋离子化室用于测量空气中小体积气体的浓度。
2. 2.The pocket ionization chamber was developed by scientists to study the properties of matter at very low temperatures.
   口袋离子化室是由科学家开发出来的，用来研究物质在非常低温下的性质。
3. 3. The pocket ionization chamber is essential for experiments that require precise measurements of gas concentrations.
   口袋离子化室对于需要精确测量气体浓度的实验来说是必不可少的。