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51. | sensitive indicator |
| 灵敏指示物 |
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52. | sensitive gas alarm |
| 燃气灵敏报警器 |
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53. | sensitive length |
| 灵敏区长度 |
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54. | primary sensitive element |
| 主灵敏元件 |
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55. | sensitive microrelay |
| 微型灵敏继电器 |
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56. | ultrasensitive magnetometer |
| 超灵敏磁强计 |
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57. | sensitive mini-relay |
| 小型灵敏继电器 |
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58. | sensitive polarized relay |
| 灵敏极化继电器 |
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59. | sensitive upright drilling machine |
| 立式灵敏钻床 |
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60. | neutron sensitive material |
| 中子灵敏材料 |
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