quartz

• Testing method for optical - grade synthetic quartz crystal
  人造光学石英晶体试验方法
• Test - fixture of surface mounting quartz crystal units
  表面安装石英晶体元件的试验台
• Please send us your price list of quartz clocks
  请寄给我们贵方的石英钟价目单
• Transparent quartz glass tubes for semiconductor technology
  半导体用透明石英玻璃管
• In 1968 , prototype quartz crystal watches were introduced
  1968年推出样机石英手表
• The rule of type designation for quartz crystal units
  石英谐振器型号命名方法
• Gold ore main type is auriferous quartz vein type
  金矿床主要为含金硫化物石英脉型。
• Study on solid inclusions in natural quartz crystals
  天然水晶中常见的固态包裹体研究
• 711 please send us your price list of quartz clocks
  请寄给我们贵方的石英钟价目单。
• Quartz crystal controlled oscillators - generic specification for
  石英晶体振荡器总规范