high speed steel drills 高速钢钻头
carbon tool steel drills 碳素工具钢钻头
steel for drills 钻具用钢
high-speed steel twist drills 高速钢麻花钻
steel-toothed gear drills 钢齿牙轮钻头
High-speed steel two-flute twist drills 高速钢双凹槽麻花钻
The company's sales YG drill, stainless steel drills, welcome all the friends to visit.
本公司销售YG钻头，不锈钢钻头，硬质合金钻头等多种，欢迎各界朋友的光临。
The wire-line coring tool of HSQ serial has kept up the technical features of conventional placer drills and derived the advanced structure from steel cable fishing tool for inner barrel.
HSQ系列绳索取心钻具，既保持了现用砂钻钻进的工艺特点，又发挥了钢绳打捞内管技术的方便性。
Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available.
虽然也有硬质合金刀尖的钻头，麻花钻一般用高速钢制成。
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