witness mark
常见例句
- After degating only a small witness mark remains.
浇口切除后只留下细小痕迹。 - The main disadvantage of the design is that a large witness mark is left on the moulding which must subsequently be trimmed and finished.
这种设计的主要缺点是在塑件上留下一个可见的痕迹，从而必须增加一道后续的修剪和抛光的工序。
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