During the process of design, to get a desired and satisfactory fit character the designer must first of all be able to understand and distinguish fit types correctly.

• 在机械设计过程中,选择配合或用新国标代换旧国标时,为了得心应手,为了得到预计的、满意的配合性质,则首先必须正确认识与正确区分配合类别与配合性质。