GB/T 3098.23-2020
Mechanical properties of fasteners—M42~M72 bolts, screws and studs 紧固件机械性能 M42~M72螺栓、螺钉和螺柱 |
GB/T 38684-2020
Metallic materials—Sheet and strip—Biaxial stress-strain curve by means of bulge test—Optical measuring systems 金属材料 薄板和薄带 双轴应力-应变曲线胀形试验 光学测量方法 |
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