An example is proposed to demonstrate the convenience of the simulator , and the inertia error is less than 0 . 0051 % 实例证明双杠铃式模拟件可以方便地实现不同航天器的质量、惯量模拟，惯量模拟误差小于0 . 0051 % 。
Gymnastic equipment - parallel bars and combination asymmetric parallel bars - functional and safety requirements , test methods ; german version en 914 : 1996 体操器械.双杠和组合高低杠双杠.功能要求和安全要求
Carl schumann won three events in gymnastics ( individual horse vault and horizontal bar and parallel bars team competitions ) in 1896 1986年在希腊雅典举行的首届现代奥运会上，德国选手卡尔?舒曼夺得了个人跳马和单杠，以及双杠团体比赛的3枚金牌。
Double bars , swinging boards , multi - function training machines , seesaws , jogging machines and similar facilities have formed mini - sized gymnasiums , simple but meaningful 双杠、秋千、多功能器械、跷跷板、跑步机和其他类似设备已经形成了小规模的体育馆，虽然简单，却很实用。
The configuration and the layout of the barbell simulator are presented , the adjusting method and the parameters of the simulator are made , and the mathematic formulae of the simulator are listed 介绍了双杠铃式模拟件的结构、布局，确定了双杠铃式模拟件的调整参数和调整方法，建立了数学公式。
T he result show that the training sessions before the major competition were effe ctively carried out , which ensured that the chinese national gymnastic team won the champions of the olympic men ' s team , parallel bars and balance beam 结果表明，中国体操队大赛前训练课的有效实施，是该队夺得悉尼奥运会男子团体及双杠、平衡木冠军的根本保障。
A double barbell simulator is proposed to simulate spacecraft ' s mass and inertia on a new type of ground docking dynamic test bed and to make the ground docking dynamic test equal to the real docking process in space 摘要针对一种新型的地面对接动力学仿真试验台，提出采用双杠铃式模拟件模拟航天器的质量、惯量，使地面对接试验与空间对接相当，确保试验的真实性。
Furthermore , it exp1ains the reason of tolerance and how to overcome and reduce tolerance thxough the ana1ysis of a tree of the tolerance source of the electronic belt weighing conveyor . giving the example of the tolerance analysis of the electronic belt weighing conveyor with double idlers and levers - it brings forwfard the measures to improt - e the precision and stabi1ity , and the ideas of sery ' iceability and maintenanceability . as a result , the proposal of the new type electronic belt weighing conveyor is put forward 接着，以电子皮带秤的误差源树展开分析，说明各误差产生的原因以及如何克服和减少误差的方法，再具体通过对本公司生产的双托辊双杠杆电子皮带秤进行误差分析，得出了提高电子皮带秤精度和长期稳定性的方法以及可维护性和可维修性的思想，进而提出了新型电子皮带秤的方案。
But there are some defaults in conventional balance values , such as low - frequency vibration , excessive high controlling - pressure , disadvantage in stability and safety , complicated construct etc , the key matters are that the valves neither work solely nor run synchronously in two cylinders 但传统的平衡阀存在着不少缺点，如低频振动、控制压力偏高、工作平稳性和安全性较差、结构较复杂等，关键问题是在双杠变幅等回路中，既不能单独应用，又不能实现双缸同步运行。
Though ringweight lifting had been beyond his strength and the full circle gyration beyond his courage yet as a high school scholar he had excelled in his table and protracted execution of the half lever movement on the parallel bars in consequence of his abnormally developed abdominal muscles 尽管在举重比赛方面他的体力不够，对于空中旋转，勇气又不足，然而念高中时，多亏腹部肌肉异常发达，他有本领在双杠上两臂垂直，双腿向前抬起，与身子成直角，长时间稳定地保持平衡。
