 |
| |||
| brake-field tube | |||
| retarding-field tube; retarding field tube; retarding field valve | |||
| retarding-field valve | |||
| лампа с тормозящим полем: 2 短语, 1 学科 |
| 电子产品 | 2 |
|
| |||
| brake-field tube | |||
| retarding-field tube; retarding field tube; retarding field valve | |||
| retarding-field valve | |||
| лампа с тормозящим полем: 2 短语, 1 学科 |
| 电子产品 | 2 |