由运算符—通常和您在正则表达式中看到的符号相同—来指定小部件在较大的部件中出现的频率和顺序。
The frequency and order in which small parts may occur in larger parts is specified by operators — mostly the same symbols you see in regular expressions.
部件类型—由分类符号B指定。
制造的部件的目标机器名称—由分类符号M表示。
Machine name for which the part is manufactured - Donated by classification symbol m.
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