倍频调制法
frequency doubling modulation method
便携式盒式调频调幅收录机
portable cassette type FM-AM recorder-receiver
变流变压变频调压技术
non-constant flow and pressure water-supply techni
变频调节阀
inverter dynamoelectric valve
变频调节试验
frequency conversion experiment
变频调速参数
frequency control milling parameter
变频调速单元
frequency control modules
变频调速电动机
changing frequency regulating speed electric motor
变频调速供水
frequency-conversion and speed-adjusting water supply
变频调速恒压供水系统
Frequency conversion speed adjusting
变频调速技术
variable-frequency speed-regulating technology
变频调速节能方案
Variable frequency speed regulating