常見例句雙語例句After degating only a small witness mark remains.澆口切除后只留下細小痕跡。The main disadvantage of the design is that a large witness mark is left on the moulding which must subsequently be trimmed and finished.這種設(shè)計的主要缺點是在塑件上留下一個可見的痕跡，從而必須增加一道后續(xù)的修剪和拋光的工序。http://www.chazidian.com 返回 witness mark