| |||
| ★ 工频试验变压器 | |||
| |||
| 工频试验变压器 | |||
|
power frequency testing transformer : 4 phrases in 2 subjects |
| Electric machinery | 2 |
| Hydroelectric power stations | 2 |
| |||
| ★ 工频试验变压器 | |||
| |||
| 工频试验变压器 | |||
|
power frequency testing transformer : 4 phrases in 2 subjects |
| Electric machinery | 2 |
| Hydroelectric power stations | 2 |