In the middlepressure chamber upside sets floating seal device, so vortex top and middlepressure by exhaust pressure role.
在中间压力腔上部设有浮动密封装置，因此涡旋顶部受排气压力与中间压力作用。
2
Taking the leakage of middlepressure gas network for example, the development of emergency plan for sudden environmental pollution accident is discussed.
以中压燃气管网泄漏为例，论述了突发环境污染事故应急预案的制定。
3
Pros and cons as well as the effect of upgrading inferior FCC gas oils by caustic treating, hydrotreating, middlepressure hydro-upgrading and solvent refining etc.