Used for measure tensile strengh and breaking elogation of single yarn and print statistic results.
用于全自动测定单根纱线的断裂强力和断裂伸长，打印测试数据和统计结果。
Methods To evaluate the clinical effects of 45 all ceramic crowns and Bridges of the anterior teeth on fitness, colour, shape and strengh.
方法用美国公共健康协会的修正标准对45颗全瓷冠桥进行观察评价。
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