WordNet (3.0)WordNet (3.0)
(n)a series of tubes (joined by screwed collars) that connect a drilling platform to the drilling bit; rotates the bit and supplies drilling mud
เพิ่มคำศัพท์
ทราบความหมายของคำศัพท์นี้? กด เพื่อใส่คำนี้พร้อมความหมาย เพื่อเป็นวิทยาทานแก่ผู้ใช้ท่านอื่น ๆ
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