| Business Name | Address | |
| Old Line Electric | 410 Shannon Ct Frederick, MD 21701 |
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| Maryland Electric Inc | 417 W Patrick St Frederick, MD 21701 |
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| Bopat Electric Co | 305 E 4th St Frederick, MD 21701 |
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| Arc Electric | Frederick, MD 21701 |
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| Brandenburg Electric Inc | 700 N East St Frederick, MD 21701 |
|