Through application of frequency converter in constant pressure water supply system, the paper describes the economic feature and advantages of adopting AC frequency conversion speed control method.
通过变频器在恒压供水系统中的应用，阐述了采用交流变频调速控制方案的经济性和优越性。
The cranes feature a redeveloped control valve that is said to reduce pressure peaks to improve service life and reduced deadweight.
这些型号起重机与众不同之处在于应用了据说可以减少峰值压力、降低重负、提高使用寿命的经过改进的控制阀。
The cranes feature a redeveloped control valve that is said to reduce pressure peaks to improve service life and reduced deadweight.
这些型号起重机与众不同之处在于应用了据说可以减少峰值压力、降低重负、提高使用寿命的经过改进的控制阀。
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