他们指出了把冶金工业采用的断裂标准应用于增强塑料的不适合性.They point out inadequacies in applying criteria developed from metallurgical practice to reinforced plastics.呼吸器与使用者脸部的适合性(适配行)是非常重要的.Fit of the respirator to the face is very important.只有供...
Results There exists significant difference regarding to the comfort, function and fixedness between implant complete denture.结果种植固定义齿与下颌半口义齿在舒适 、 功能、固位等方面存在明显差异.Objective To increase the retention and stability of tradi...
Their numerical system, derived from the Babylonians, was based on multiples of the number six.他们的数制源自古巴比伦人，以数字6的倍数为基数。The sexagesimal scale, or number system based on 60, was used by ancient Babylonians.古巴比伦人用六十进位制, 即以6...