这些标准件的特点是具有相同或相似的结构特征，只是尺寸规格有所不同。

These standard parts are characterized by the same or similar structure, but different sizes.

youdao

这些标准件的特点是具有相同或相似的结构特征，只是尺寸规格有所不同。

These standard parts are characterized by the same or similar structure, but different sizes.

youdao