An electro-chemical ultra-precision lapping machine with five freedoms of X-, Y- and Z-axis linear movement as well as rotation about X- and Z-axis is developed.

研制了能够实现X、Y、Z三轴直线运动和绕X、Z两轴转动的空间五自由度电化学超精密研磨机床。

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The necessary condition for the existence of double crank of five - bar linkage with two degree of freedoms is derived on the basis of assembling conditions.

根据装配条件推导了二自由度五杆机构的双曲柄存在的必要条件。

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Here is a short summary of five things which we need to do in order to preserve our freedoms.

CENTERFORSECURITYPOLICY: Center For Security Policy