GB/Z 38434-2019金属材料力学性能试验用试样制备指南标准
英文:Metallic materials—Guide to test pieces preparation for mechanical testing GB/Z 38434-2019介绍: 国家标准《金属材料 力学性能试验用试样制备指南...
英文:Metallic materials—Guide to test pieces preparation for mechanical testing GB/Z 38434-2019介绍: 国家标准《金属材料 力学性能试验用试样制备指南...
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英文:Information security technology—Guide of information security assurance framework for smartcities GB/Z 38649-2020介绍: ...
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英文:Specification for operation management of biochar production from crop staw on soil quality improvement project GB/Z ...