Design of four - bar linkage is emphasis and difficulty of hydraulic support.

四 连杆机构 的设计是液压支架设计的重点和难点.

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A four - bar - width bar code said to be the European counterpart of UPC.

一种四条宽的条形码,是通用产品代码(UPC)在欧洲的变型.

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In addition, the curve approximation method, a new four - bar linkage theory, is introduced.

还介绍了四 连杆机构 的新理论-曲线逼近方法.

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The plane four - bar linkage , the plate cam and follow, and - mechanism are familiar examples of planar mechanism.

平面四连杆机构,平面盘形凸轮及其从动件以及曲柄滑块都是平面机构常见的例子.

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