| Business | Phone |
| William N Harris Inc 479 Douglas Ave, Providence 2908 | (401) 751-4774 |
| Temptrol Inc 50 Blundell St, Providence 2905 | (401) 461-0058 |
| Izzi & Sons Inc 181 Valley St, Providence 2909 | (401) 751-4860 |
| Jkl Engineering 945 Westminster St, Providence 2903 | (401) 351-7600 |
| Mercury Tec Inc 65 Narragansett Ave, Providence 2907 | (401) 785-0095 |
| Mutual Engineering Svc Co 304 Lockwood St, Providence 2907 | (401) 351-3900 |
| Regan Engineering & Svc Corp 235 Georgia Ave, Providence 2905 | (401) 461-8100 |