After 1 positioning pin experiment determined After 2 materials pieces experiment determined 3 all bolts, the feather piece match according to the blueprintdoes 4 raised traces with the under thing board excessively fullcoordination, excessively full quantity 0 - 0.005mm 5 raised traces according to the concave mold matches,unilateral 1.5mm 6 concavely traces according to the digital-analog processing 7 quenches HRC58-62 8 quenching and tempering HRC30-35 9 not signs notes size reference digital-analog
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