在低压储层进行欠平衡钻井时常选用气体型低密度流体。

Gas drilling fluid is often used in UBD in low pressure formation.

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利用气体型流体进行欠平衡钻井，或钻易漏地层时，流体密度及井下液柱压力的确定十分重要。

When underbalanced drilling or drilling easy leaky zone by using aeration fluid, the determination of fluid density and downhole fluid column pressure is very important.

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半导体型的金属氧化物，如氧化锡(SnO2)、氧化钛(TiO2)和氧化锌(ZnO)，经常作为活性材料用在固态气体传感器件中。

Semiconducting metal oxides such as tin oxide (SnO2), titanium dioxide (TiO2) and zinc oxide (ZnO) are routinely used as active materials in solid state gas sensing devices.

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半导体型的金属氧化物，如氧化锡(SnO2)、氧化钛(TiO2)和氧化锌(ZnO)，经常作为活性材料用在固态气体传感器件中。

Semiconducting metal oxides such as tin oxide (SnO2), titanium dioxide (TiO2) and zinc oxide (ZnO) are routinely used as active materials in solid state gas sensing devices.

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