At a minimum, this metadata can be free-form text; but specific reference data such as URLs or artifact names/IDs would be more useful.
这些元数据可以是任意形式的文本；但是 URL 或工件名称/ID 等引用数据更有意义。
2
A novel method is proposed to calculate the minimum distance from tool to free-form surface, to solve tool interference problem in 5-axis nc sculptured surface machining.