四分头 E
耐磨性强；
先进的加工工艺，保证钻头的高品质；
钻孔时受力强度更高，减少断齿或开裂的风险。
1.Stronger abrasion resistance
2.Advanced processing to guarantee the bit high quality
3.Higher force intensity during the drilling, and reduce the risk of breaking or cracking the teeth.
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