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| 引信〔线〕; 火箭发动机点火器; 防风〔耐风〕火柴; 红色闪光信号灯; 驾驶拉杆球头轴承; 钟表均力圆锥轮; 发条轮; 发条保险链 | |||
| 蜗形绳轮; 螺旋输送器; 信管 | |||
| 火管信号 | |||
| 点火器 (火箭发动机的); 引信 | |||
| 均力圆锥轮; 均力器; 耐风火柴 | |||
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| 引信; 耐风火柴 | |||
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fusee : 6 phrases in 1 subject |
| Technology | 6 |
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