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| 51. | main valve bush |
| 主阀衬套 |
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| 52. | The flannel bush. |
| 佛里蒙特属的植物法兰绒灌木 |
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| 53. | hawthorn | May bush |
| 山栌| 山楂 |
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| 54. | bush kideny bean |
| 矮生菜豆 |
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| 55. | governor bottom bush |
| 调速器下部轴承衬套 |
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| 56. | main spindle bush |
| 主轴瓦 |
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| 57. | elevator shaft bush |
| 升降机轴衬 |
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| 58. | bush hammered concrete |
| 石锤修琢混凝土 |
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| 59. | Money Bush cotton |
| 钱丛棉 |
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| 60. | bush roller chain |
| 套筒滚子(柱)链 |
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