Boiler control system is composed of drum water level control system, stempressure control system, hearth negative pressure control system and combustion economical control system.
锅炉控制系统可以分为汽包水位控制系统、蒸汽压力控制系统、炉膛负压控制系统和燃烧经济控制系统。
2
Others have less rigid currencies but still intervene to stem what they regard as excessive upward pressure.
其它国家汇率没这么僵硬,但仍进行干预以抑制他们认为过度的升值压力。
3
Federal funding of stem-cell research has been withdrawn as a result of pressure by people-a minority among taxpayers-who take a moral stand against it.