The speed skating straight pendulum arm is a new technology, Mr.
速度滑冰直摆臂是一项新的技术，唐先生欢迎大家交流讨论。
The drafting roller weighting by spring pendulum arm reliable and easy to operate.
牵伸装置采用螺旋弹簧加压的摇架，压力稳定可靠，操作方便。
Computer is used as digital controller in control system of three-freedom degree digital machine arm based on BP algorithm, and potentiometer measures position of hoist and up-down pendulum Angle.
基于BP算法的三自由度数字式机械臂系统控制用计算机作数字控制器，电位计测量车位置、上下摆角度。
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