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农业机械中,有不少的零件是属于钣制件,其中许多零件具有大小不等孔径与孔距的孔。为了保证其配合尺寸,往往需要有导向结构
In agricultural machinery, there are many parts belonging to sheet metal parts, many of which have different sizes of holes and hole pitches. In order to ensure its size, often require a guide structure