• 1. union coupling: 联管节 | 管结合
• 2. union coupling elbow: 弯管接头
• 3. flared union coupling: 啦叭口接头

更多释义

• 1.Based upon screw theory and set theory, the structural characteristics of lower-mobility parallel robots was studied via the union of limb constraints and the coupling of loop over-constraint.
  应用螺旋理论与集合论原理，按照支链并联、回路耦合的观点，进行少自由度并联机器人构型特征的研究。
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