double bar

同根派生

The type transform theory is extended to the analysis of geared linkages, so that any geared linkage can be decomposed into a series of single link and extended double bar Assur Group.
将型转化理论拓广于齿轮连杆机构的分析中，使任一齿轮连杆机构都可以分解为单构件和广义双杆组。
The anterior and posterior palatal circle(double bar) on the other hand is mechanically and biologically sound and cannot be cirticized if it is loacted as not to impinge upon tissues.
前后腭杆设计无论在机械上还是在生物学上都比较合理，如果在设计上能够避免压迫软组织将是非常理想的。
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。
He ordered a large double Scotch from the bar man.
他向酒吧服务员要了大杯双人份苏格兰威士忌。
He is working double tides to finish his essay.
他日夜苦干，赶写他的文章。