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| 灯泡管脚座; 插销座 | |||
| 卡口灯头; 插接灯头 | |||
| pin base: 13 phrases in 5 subjects |
| Automobiles | 1 |
| Drilling | 1 |
| Electronics | 2 |
| Metallurgy | 1 |
| Technology | 8 |
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