双变频接收机 double conversion receiver
双变频超外差接收机 [电讯] double superheterodyne receiver
双变频控制 Dual Inverter control
双变频超外差式接收机 dual-conversion superheterodyne receiver
双变频器 Two transducer ; Dual-inverter
双向离子变频器 cycloinverter ; cycloconverter
双线栅变频器 grating converter
双馈式变速恒频 DFVSCF
双音调调变频率 dual tone modulation frequency
双变频简约机械结构，易维护，磨损少，寿命长。
Duble frequency conversion struchre, simplfied structure. easy to maintain, less wear and "long time".
双变频简约机械结构，易维护、磨损少、寿命长。
Double transducer simplifies mechanic gearing. Easy to maintain, little wear and long life.
采用双变频调速技术，日本松下变频器，保证机器各部位运行同步。
The machine adopts dual-frequency conversion timing technology and Japan panasonic transducer, assuring every part drives synchronously.
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