An improved four-parameter DH model is used to deduce the double parallel-joint CMM measurement model. Error model of the double parallel-joint CMM is discussed based on the measurement model.
文中利用改进四参数DH模型导出平行双关节坐标测量机的测量模型，在此基础上建立该坐标测量机的误差模型。
The utility model relates to an improved straight handle type artificial hip joint fixed by the screw bolt of a femur big rotor.
本实用新型涉及一种改进的、经股骨大转子螺栓固定的直柄式人工髋关节。
The utility model provides an improved mechanical sealed adhesive pipe joint, which takes the mechanical mode to seal and the adhesive mode to fix.
本实用新型提供一种改良的机械密封粘接式管接头。
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