JIS Z9101-2018 4346 Graphical symbols -- Safety colours and safety signs -- Part 1 Design principles for safety signs and safety markings《图形符号 安全颜色和安全标志 第1部分 安全.pdf

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JIS Z2345-1-2018 Standard test blocks for ultrasonic testing -- Part 1 A1 Standard Test Block《超声检测用标准试块 第1部分 A1标准试块》.pdf

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