The cross-section symbol of the pattern fill is a necessary material marker for the cross-sectional view of the solid object.
填充图剖面符号是机械制图、建筑制图中实体剖视图必不可少的材料标识。
The cross-section symbol of the pattern fill is a necessary material marker for the cross-sectional view of the solid object.
填充图剖面符号是机械制图、建筑制图中实体剖视图必不可少的材料标识。
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