The moduli and velocities remain steady and unchanged at medium saturation area.
中等饱和度时，模量、波速基本不随饱和度变化。
On the grounds of the pinch-off voltage, the cut-off point of variable resistance area and saturation area can be fixed, so the field effect tube can reliably work in the saturation area.
根据夹断电压能确定可变电阻区与饱和区的分界点，使场效应管可靠地工作在饱和区的原理。
The reservoirs of the medium rank coal characterize low gas content, low gas saturation, good permeability, and high energy in Hedong area of Shanxi, China.
中国山西河东地区中阶煤储层的含气量比较低、含气饱和度低，而储层渗透性好，储层能量比较大；
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