quartz

• Crystal unit , quartz , type ja 538 , detail specification for
  Ja538型石英晶体元件详细规范
• Quartz wrist watches ; requirements , testing , marking
  石英手表.第1部分:要求检验标记
• Flocculating ability of mycobacterium phlei to hematite and quartz
  石英絮凝能力的比较
• Measurement methods for quartz crystal oscillators
  石英晶体振荡器测试方法
• Please send us your price list of quartz clocks
  请寄给我们石英钟价目表。
• Rose quartz bracelet 8mm natural rose quartz
  粉晶开运手环8mm天然芙蓉粉晶
• P > 711 please send us your price list of quartz clocks
  请寄给我们贵方的石英钟价目单。