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| 加大贯眼型钻杆接头; 大贯眼; 一种钻杆螺纹接头形式4扣/英寸 | |||
| 加大贯眼〔型〕 | |||
| 补充钻孔; 补充炮孔眼 | |||
| 补充炮孔; 附加炮孔 | |||
| 额外穴; 加赛穴; 延长洞 | |||
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extra hole : 4 phrases in 2 subjects |
| Drilling | 3 |
| Technology | 1 |
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