| 1 | The utility model relates to a double filament fluorescent lamp and a lamp base. | |
| 2 | After sealing the header is cleaned and then the leads are clipped to the desired length. | |
| 3 | While a pair of hollow jacks without electrodes are correspondingly and additionally arranged on the lamp base. | |
| 4 | Check the fuse whether is broken or damage: if the fuse damaged, then the small red lamp of the fuse will be light (with the picture 7 right). | |
| 5 | The key points of fillet welding and NDT arc introduced form practical experience for 300 MW boiler steam drum. |
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