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| 螺栓头镦锻机 | |||
| 螺栓头锻压机 | |||
| 螺栓顶锻机 | |||
| 螺栓锻造机 | |||
| 螺栓头镦锻机; 螺栓头锻造机; 螺杆冷镦机 | |||
| bolt header: 2 phrases in 2 subjects |
| Architecture | 1 |
| Technology | 1 |
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