钻头同义词

drill stem───[机]钻柱；[机]钻杆；钻具

drill string───钻柱

drill strings───钻柱（drillstring的复数）

drills down───向地下钻；深度探讨

drill down───向地下钻；深度探讨

drill ship───钻井船；教练船

drill ships───钻井船；教练船

• drills cordless
• drills explained
• drills synonym
• drills terraria