单词	变频发信
释义	变频发信frequency change signaling
随便看	pneumatic snap pneumatic spade pneumatic sprayer pneumatic spraying equipment pneumatic spring tensioner pneumatic squeezer pneumatic squeeze riveter pneumatics, science pneumatic stamper pneumatic stapler pneumatic stapler for metallic mesh pneumatic starter pneumatic starting valve pneumatic steelmaking pneumatic stirrer pneumatic stirring pneumatic stowing pneumatic strain gage pneumatic strapping machine pneumatic stripper pneumatic studio pedestal pneumatic subway pneumatic suit pneumatic surge chamber pneumatic switch