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 GB/T 11312-1989  
Test methods for SAW properties of piezoelectric ceramics and crystals

压电陶瓷材料和压电晶体声表面波性能测试方法
 GB/T 11479-1989  
Blank detail specification for camera tubes

摄像管空白详细规范(可供认证用)
 GB/T 11320-1989  
Test methods for the properties of piezoelectric ceramics--Material with the low mechanical quality factor

压电陶瓷材料性能测试方法 低机械品质因数压电陶瓷材料性能的测试

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