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 GB/T 36914.2-2018  
Textile machinery and accessories—Rings and travellers for ring spinning and ring twisting frames—Part 2: HZ-and J-rings and their travellers

纺织机械与附件-环锭细纱机和环锭捻线机用钢领和钢丝圈-第2部分:HZ型和J型钢领和配用的钢丝圈
 GB/T 31370.5-2018  
Test method of flat panel display (FPD) color filters—Part 5: Contrast ratio

平板显示器(FPD)彩色滤光片测试方法-第5部分:对比度

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