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51. | hydrant-cover key |
| 消火栓盖钥匙 |
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52. | DH = double hydrant |
| 双出口消火栓 |
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53. | hydrant refuelling system |
| 加油栓加油系统 |
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54. | hydrant and extinguisher cabinet |
| 消火栓和灭火器箱 |
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55. | catch a hydrant |
| 装接吸水管 |
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56. | portable irrigation hydrant |
| 轻便灌溉放水栓 |
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57. | frost-proof hydrant |
| 防冻栓 |
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58. | I'll be right down, fire hydrant. Tell mom, I'm just gonna finish this paragraph. |
| 我马上下来,消防栓。告诉妈妈,我马上就写完这一段。 |
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59. | on-site hydrant |
| 现场消火栓 |
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60. | swan-neck hydrant key |
| 鹅颈消防栓匙 |
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