实践表明，加工管板不同的走刀路线其长度相差极大。
Practice shows that different knife route for machining tube sheet will cause a very big difference of it's length.
部件长度小于2“，可以配合管切割加工以节省成本。”
In parts under 2 "in length, Notching can be combined with tube cutting, for cost savings."
部件长度小于2“，可以配合管切割加工以节省成本。”
In parts under 2 "in length, Notching can be combined with tube cutting, for cost savings."
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