China National Standards
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'casings'
China GB Standards List

 QB/T 4055.2-2011  
Cermet casings of watches - Part 2: Carbide cermet casings

手表用金属陶瓷外观件 第2部分:碳化物金属陶瓷外观件
 QB/T 4055.1-2010  
Cermet casing of watches - Part 1: Oxide cermet casings

手表用金属陶瓷外观件 第1部分:氧化物金属陶瓷外观件

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