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81. | a Banner hanging slack. |
| 无力挂着的旗帜 |
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82. | hoist slack-brake switch |
| 吊车制动器过松开关 |
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83. | slack adjuster worm gear |
| 减速调整器蜗轮 |
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84. | take up the slack |
| 1.收紧松弛的绳索 |
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85. | slack at one's job |
| 怠忽职守 |
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86. | caused by bundle slack |
| 由于捆松的原因而造成的 |
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87. | Hatch-Slack-Kortschak pathway |
| 哈奇-斯莱克-科特萨克途径 |
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88. | area of slack water |
| 缓流区 |
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89. | period of slack sales |
| 销售淡季 |
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90. | keep a slack hand |
| 放松缰绳|漫不经心地管理 |
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