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| 21. | This is the reason why in the drill core of Co Ngoin which penetrates the whole Quaternary series the |
| 正因为有古湖外泄的一段历史,故可以理解钻穿了整个第四纪地层的错鄂孔B/M界线以上部分的地层较薄的原因了。 |
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| 22. | combined taper pipe tap and core drill |
| 扩孔钻和锥管丝锥复合刀具 |
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| 23. | core drill for wood working |
| 木工空心钻 |
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| 24. | drilling with step core drill |
| 阶梯扩孔 |
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| 25. | carbide welded taper shank core drill |
| 硬质合金焊接式锥柄扩孔钻 |
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| 26. | tool shank for shell core drill and reamer |
| 套式扩-铰刀刀柄 |
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| 27. | double core barrel drill |
| 双筒取心钻具 |
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| 28. | sintered blades, brazed blades, laser-welded and gas-welded blades), grinding wheels, polishing pads, core |
| 通过几年的发展，公司现有产品包括人造金刚石锯片（包括烧结、高频焊接、激光焊接、气焊产品）、磨轮、抛光片、薄壁工程钻头、地质钻头等系列产品。 |
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