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51. | typewriter calculating device |
| 打字机计算装置 |
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52. | typewriter console monitor |
| 打字机操作台监视器 |
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53. | typewriter output routine |
| 打字机输出程序 |
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54. | portable electronic typewriter |
| 便携式电子打字机 |
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55. | cylinder console typewriter |
| 柱形控制台打字机 |
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56. | perforating computing typewriter |
| 穿孔计算打字机 |
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57. | master a typewriter |
| 熟练地使用打字机 |
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58. | console monitor typewriter |
| 控制台监视打字机 |
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59. | electrical English typewriter |
| 电动英文打字机 |
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60. | data-logging typewriter |
| 数据记录打字机 |
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