各种不同长度的钻杆的英文

• steel changes

• 不同:    not alike; different; distin ...
• 长度:    length; longitude; size; ext ...
• 的:    4次方是 The fourth power of 2 i ...
• 钻杆:    bull rod; bar; rod; drill st ...
• 各种不同的:    c.various different from each other of different kinds; varied: of different sorts