| 1 |
00:00 164 |
| 2 |
00:00 173 |
| 3 |
00:00 144 |
| 4 |
00:00 131 |
| 5 |
00:00 144 |
| 6 |
00:00 145 |
电力变压器绕组直流电阻测量