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51. | radio telemetry buoy |
| 无线电遥测浮标 |
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52. | buoy marking wave recorder |
| 波浪记录仪浮标 |
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53. | buoy throwing out mechanism |
| 浮标抛出机构 |
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54. | telegraph-ca le buoy |
| 电报电缆浮标 |
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55. | marine meteorological buoy |
| 海洋气象浮标 |
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56. | light and bell buoy |
| 闪光钟响浮标 |
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57. | maritime buoyage system |
| 海上浮标系统 |
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58. | free drifting buoy |
| 自由漂动浮标 |
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59. | measurement comparison buoy |
| 对比测量浮标 |
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60. | buoy failure report |
| 浮标损坏报告 |
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