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51. | safe discharge concentratio |
| 安全排放浓度 |
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52. | safe country principle |
| “安全国家”原则 |
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53. | safe receptive capacity |
| 安全接收能力 |
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54. | safe ejection altitude |
| 安全弹射高度 |
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55. | safe seismic distance |
| 安全震距 |
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56. | safe deposit vaults |
| 安全保管库 |
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57. | safe stopping distance |
| 安全制动距离 |
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58. | safe driving glasses |
| 安全驾驶镜 |
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59. | unit safe stress |
| 单位安全应力 |
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60. | safe expansive inhibitor |
| 安全膨胀抑制剂 |
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