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51. | leadless package |
| 无引线外壳 |
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52. | monolithic case |
| 整体外壳 |
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53. | The shell of a cockle. |
| 鸟蛤的外壳 |
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54. | blooming mill housing |
| 初轧机外壳 |
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55. | exhausted enclosure |
| 废外壳〔盒子 |
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56. | the skin of an aircraft |
| 飞行器的外壳 |
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57. | locomotive fairing |
| 机车流线型外壳 |
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58. | housing for liquid fuel furnace burners |
| 液体燃料燃烧器外壳 |
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59. | concrete condenser box |
| 混凝土外壳冷凝器 |
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60. | glass ceramic package |
| 玻璃 陶瓷外壳 |
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