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51. | audibility limit |
| 可听度极限 |
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52. | tolerance limit |
| 容许限度 |
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53. | acceptability limit |
| 合格范围 |
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54. | tolerable limit |
| 容许极限 |
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55. | ionization limit |
| 电离限 |
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56. | secondary limit |
| 次级极限 |
|
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57. | cavitation limit |
| 涡空极限|空隙压力极限 |
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58. | sensitive limit |
| 灵敏限 |
|
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59. | extinction limit |
| 熄灭极限 |
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60. | excavation limit |
| 开挖范围线 |
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