The porosities are measured by water displacement, solvent displacement, helium inflow and mercurypressure.
用饱水法、溶剂法、氦流法和压汞法测定孔隙率。
2
It is proved that the perform which be able to comparison between the mercurypressure meter and the vibration cylinder pressure sensor through the comparison.
通过振筒气压仪与水银气压表动态比对试验，验证了振筒气压仪与水银气压表观测数据的可比性。
3
The internal gears of these contraptions were turned either by the pressure of uncoiling springs or the flow of water, mercury or sand.