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81. | the back of a couch |
| 睡椅的靠背 |
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82. | The back of the knee. |
| 掴膘盖窝 |
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83. | kick back of chain saw |
| 油锯反弹 |
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84. | The back of a horse. |
| 马背马的背部 |
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85. | step-back method of welding |
| 分段反向焊法 |
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86. | the broad of the back |
| 背部的宽处 |
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87. | internal injury of lower back |
| 腰部内伤 |
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88. | turning back of cloth roller |
| 卷布辊翻转 |
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89. | The back of the neck. |
| 项颈的后部 |
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90. | back part of the shed |
| 梭口后部分 |
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