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[vc_row][vc_column][vc_custom_heading source=”post_title”][vc_column_text] Due to the long production cycle, large investment, high manufacturing precision and high cost, the die-casting mold has harsh working conditions. When the

[vc_row][vc_column][vc_custom_heading source=”post_title”][vc_column_text] Due to its light weight, low cost and low transmission noise, plastic gears are widely used in automobiles, instruments, household appliances, toys and