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| 51. | Morse standard taper |
| 莫氏标准锥度 |
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| 52. | taper twist drill |
| 锥柄麻花钻 |
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| 53. | spiral taper reamer |
| 螺旋槽式锥铰刀 |
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| 54. | taper cutting control |
| 斜度切割控制 |
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| 55. | morse taper gauge |
| 莫氏锥度量规 |
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| 56. | double taper bit |
| 两层镶嵌刃取心钻头 |
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| 57. | fused-taper coupler |
| 熔融锥式耦合器 |
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| 58. | Morse taper reamer |
| 莫氏锥度铰刀 |
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| 59. | illumination taper efficiency |
| 照射递减效率 |
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| 60. | taper elastic washer |
| 锥形弹性垫圈 |
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