AC variable frequency regulating speed  交流变频调速

Distributed Variable-frequency Regulating System  分布式变频调节系统

Frequency Regulating Speed  变频调速

frequency regulating transformer  调频变压器

primary frequency regulating  一次调频

va-(riable) frequency regulating speed  变频调速

Variable Frequency Regulating  变频调节

Variable Frequency Regulating Speed  变频调速

Variable_frequency regulating speed  变频调速

variable-frequency regulating speed  变频调速; 矢量控制

variable-frequency regulating-speed  变频调速

changing frequency regulating speed electric motor  变频调速电动机

variable frequency regulating speed system  变频调速系统

AC variable frequency speed regulating  交流变频调速; 交流调速; 变频调速

changing of frequency and regulating speed  变频调速

Frequency Changing and Speed Regulating  变频调速

frequency controlled speed regulating system  变频调速系统

Frequency Conversion Regulating System  变频调速系统

Frequency Conversion Speed Regulating  变频调速