单词	皮书套
释义	皮书套 leather slipcase书套
随便看	pulsed electron beam high pressure pulsed electron beams pulsed electron capture detector pulsed electron electrostatic accelerator pulsed electronic image converter pulsed electron image tube pulsed electron impaction source pulsed electron impact ion source pulsed electrostatic deflector Pulse Delta Modulation pulse-delta modulation pulse delta modulator pulse demagnetization pulsed emission pulsed emission current pulsed-emitter population pulse demode pulse demoder pulse demodulation pulse demodulator pulse demodulators pulsed encoder pulse density pulse density modulation pulsed envelopedetector