roller bit

短语词组

短语

• roller r bit 牙轮钻头
• roller bearing bit 滚柱轴承钻头
• roller cone bit 牙轮钻头
• roller cutter bit 牙轮钻头
• cross roller rock bit 十字形四牙轮钻头
• sealed roller bearing bit 密封滚动轴承钻头
• roller core bit 取心牙轮钻头
• roller -bit hole rig 牙轮钻机
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