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引伸仪是测量拉伸试件的伸长变形,用以确定材料的一些重要的力学性能的仪器.我们研制了一种新型的引伸仲仪—球铰式引伸仪.它
The extensometer is a device that measures the extensional deformation of a tensile specimen to determine some important mechanical properties of the material.We have developed a new type of extensometer - a ball extensometer