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[vc_row][vc_column][vc_custom_heading source=”post_title”][vc_column_text] The cutting stress generated during the mold processing, the stress of the spark discharge metamorphic layer, and the thermal fatigue stress generated during

[vc_row][vc_column][vc_custom_heading source=”post_title”][vc_column_text] 1.Casting shrinkage hole The main reason is that the alloy solidification shrinkage produces casting shrinkage cavities and the alloy absorbs a large amount