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tool holder is a common auxiliary device of numerical machine tool, which can complete a variety or even all machining procedures in the workpiece once clamping, in order to shorten the auxiliary processing time and reduce the error caused by multiple installation of the workpiece in the machining process, so as to improve the machining efficiency and machining accuracy of the machine tool.In simple terms, there are two situations in the process of tool change, one is that the tool is not unplugged, the other is that the tool ha... more