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http://answers.ros.org/question/207947/how-do-you-use-externally-defined-materials-in-a-urdfxacro-file/
您即将离开知乎,请注意您的帐号和财产安全。
http://answers.ros.org/question/207947/how-do-you-use-externally-defined-materials-in-a-urdfxacro-file/