窄带直接印字 narrow band direct-printing 直接印字电报 direct printing telegraph; direct-printing telegraphy ..
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narrow band direct printing 窄带直接打印 ; 带直接印字电报 ; 窄频直接打印
NBDP Narrow Band Direct Printing 窄带直接打印
Narrow Band Direct Printing Telegraphy 窄带直接印字电报
nbd narrow band direct printing 窄带直接打印
narrow-band direct-printing telegraph equipment 狭频带直接印字电报设备
NBDP Narrow-Band Direct-Printing 窄带直接印字电报
narrow w band direct printing 窄带印字报窄带直接印字电报
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