您要查找的是不是：
Hollow-Drill Steel 空心钻杆；空心钻钢
drill stell 钎杆
Drill Steel 钻钢; 钻头钢; 钎子钢; 空心钻杆;
drill steel set 钎子组; 套钎子;
Monoblock Drill Steel 整体钎子
extension drill steel 接杆钢钎
Flexible Drill Steel 挠性钢钎
Rock Drill Steel 凿岩钎钢；钎头；钎钢
drilling steel 钢钎，钻钢；钻头
drill steel 钻钢
hollow drill steel 中空钻探钢；中空钢；空心钻杆
monoblock drill steel 整体钎子
tungsten carbide drill steel 碳化钨硬质合金钢钎
hollow drill steel bar 中空钻杆钢筋
high speed steel twist drill 高速钢麻花钻