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。
The utility model relates to an improved three-way valve of a water purifier, which comprises a valve body, a water pipe joint and a water path switching mechanism.
本实用新型涉及一种净水器接水三通阀，包括阀体、水管接头、水路转换机构。
The utility model relates to an improved three-way valve of a water purifier, which comprises a valve body, a water pipe joint and a water path switching mechanism.
本实用新型涉及一种净水器接水三通阀，包括阀体、水管接头、水路转换机构。
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