单孔式回油，模具采用高碳钨合金钢不易破损。
Punch dies made of high carbon tungsten steel and not easy to wear off.
铝合金钢架计划，强度高、分量轻。
Aluminum alloy steel frame design, high strength, light weight.
合金钢材质经热处理，研磨修边刀，刀口锋利，精密度高。
Alloy steel via heat treatment, grinding blade, enable to keep sharp edge and high precision.
合金钢材质经热处理，研磨修边刀，刀口锋利，精密度高。
Alloy steel via heat treatment, grinding blade, enable to keep sharp edge and high precision.
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