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51. | housing of the open top |
| 开口式机架 |
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52. | positive shedding |
| 积极式开口 |
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53. | large opening barge |
| 大开口驳 |
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54. | shedding operated by jacquard machine |
| 提花机开口操作 |
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55. | open delta connected transformer |
| 开口三角形接法变压器 |
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56. | opening diameter of rotary |
| 转盘开口直径 |
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57. | open pipe string |
| 开口的管柱 |
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58. | broken pediment |
| 开口的三角墙 |
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59. | open side pipe vise |
| 开口管子虎钳 |
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60. | snap ring bearing |
| 开口环轴承 |
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