您要查找的是不是：
- monolithic quartz crystal filter 单片石英晶体滤波器
- The Frequency-temperature Compensation for Quartz Crystal Filter 晶体滤波器频率温度补偿
- The Design and Manufacture of Single Side Band Quartz Crystal Filter 单边带石英晶体滤波器研制
- quartz crystal filter 晶体滤波器
- Quartz crystal, crystal oscillator, ceramic resonator, ceramic filter, saw filter, ceramic discriminator. 石英谐振器，石英震荡器，陶瓷谐振器，陶瓷滤波器，声表面滤波器，鉴频器
- In 1968, prototype quartz crystal watches were introduced. 1968年推出样机石英手表.
- The quartz crystal didn't vibrate until the voltage was applied. 直到电压加上去以后石英晶体才开始振荡。
- Watches with quartz crystal movements never have to be wound. 装有石英晶体机蕊的手表毋需上发条。
- Sharp passband: Crystal filter and shaped audio reject QRM and QRN. 夏普通：晶体滤波器和形状的音频拒绝QRM和QRN 。
- Quartz crystal is perfectly crystallized. 石英晶体是完美的结晶。
- Usage: suitable for quartz crystal, sound filter, microwave device, transistor, commute tube, sensor, photoelectricity, laser device etc. air tight seal welding. 用途：适用石英晶振、声表滤波器、微波器件、晶体管、整流管、传感器、光电器件、激光器件等气密性封焊。
- Today, quartz crystal clocks are generally used on the seismograph stations. 目前，地震台站一般采用石英晶体钟。
- Research on principles and properties of a quartz crystal viscosity sensor. 石英晶体粘度传感器原理及特性研究。
- "The Crystal Resonator".A subharmonic of the frequency of quartz crystal. “水晶共振”次谐波频率的石英水晶。
- Quartz crystals are seldom used in such handsets. 石英晶体是很少使用这种手机。
- Quartz crystal resonators are devices that supply standard time base. 石英晶体谐振器是一种提供基准时基的器件。
- They include: Crystal, Crystal Filter, SPXO, VCXO, TCXO, SMD series Crystal Components. 工厂引购进日本、韩国、美国、德国等先进生产设备、材料及精密测试仪器；
- The company have an advanced product line domestic and abroad, manufacture management quartz crystal resonator chief, filter, oscillator; ceramic resonator, filter and sound surface resonator, filter,etc. 公司现拥有数条国内外先进生产线，主要生产经营石英晶体谐振器、滤波器、振荡器；陶瓷谐振器、滤波器及声表面谐振器、滤波器等。
- An optical low pass filter (OLPF) used in front of the sensor of a CCD camera was designed, according to the birefringent effect of quartz crystal and infrared cut-off optical filter. 摘要利用石英晶体的双折射效应和特殊红外截止滤光片设计并实现了一种日夜两用光学低通滤波器。
- It looks like quartz crystals sticking up out of the dark hollow. 它象石英晶体，在黑色的空间耸立着。
- 今日热词
-
- 深远海浮式风电平台 - deep-sea floating wind power platform
-
- 京雄高速公路 - Beijing-Xiongan expressway
-
- 农业及相关产业增加值 - the added value of agriculture and related industries
