ratio amplifier meaning in English

比例放大器

But homemade ratio amplifier still stays the base of step control . the stepless controlling amplifier always depends on the import
但国内在开发比例放大器方面一直停留在档位式调节基础上，具有连续调节式的比例放大器多依靠进口。
The proportional valve " natural work depends on the accurate setting of the ratio amplifier . so the work parameter must be set before the running of the valve
由于比例放大器与比例阀是一一对应的关系，比例阀的正常工作很大程度上是依靠对比例放大器的准确设定，所以比例放大器中各调节指数都需要经过测试。
Until now , there have had the single way proportional valve controlling the power or the route , double way ratio valve controlling the orientation . they cover flux control , pressure control , velocity control and position control . according to these functions , ratio amplifier has single way or double ways type amplifier
由于比例阀已经发展出单通道力、行程控制比例阀，双通道方向控制比例阀，广泛用于流量、压力、速度、位置控制等环节中，比例放大器也本着这些功能研制出了单、双通道的比例电控器。