石英

• Mr wong shek - ying , chief immigration assistant
  黄石英先生，总入境事务助理员
• Quartz crystal controlled oscillators - generic specification for
  石英晶体振荡器总规范
• Crystal unit , quartz , type ja 538 , detail specification for
  Ja538型石英晶体元件详细规范
• The reaction between molten aluminum and silica glass
  石英玻璃与铝液的反应
• Quartz wrist watches ; requirements , testing , marking
  石英手表.第1部分:要求检验标记
• The rule of type designation for quarz crystal oscillators
  石英晶体振荡器型号命名方法
• 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
• Test method for the hydroxyl groups content of silica glass
  石英玻璃中羟基含量检验方法
• A . refined quartz sand and common quartz sand
  一精制石英砂普通石英砂