用规则标号法描述系统中物体和铰的邻接关系；
The structure of the system is described through regular labelling method;
这是一种鼻尖专用的测试法，对于不同标号钢材均可区分。
This is a special tip test method, for different grades of steel can be distinguished.
这是一种鼻尖专用的测试法，对于不同标号钢材均可区分。
This is a special tip test method, for different grades of steel can be distinguished.
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