张力计
2.Methods Gastric tonometry balloon was placed through nasal way for the measurement of PCO_2,which was used in the Henderson-Hasselbach equation to calculate the pHi. pHi≤ 7.32 was used to differentiate between normal and low pHi.
3.While logging with DDL-Ⅲ,LAMBDA power unit (±12V) in TIOC, power supply unit for downhole tools, perforation panel and tensiometer are liable to fail.

