Chimneys, cooling towers, elevator bulkheads, fire towers, silos, monuments, penthouses, setbacks, scenery lofts, tanks, water towers, ornamental towers, spires, wireless, television or broadcasting towers, masts or aerials, telephone, telegraph and power poles and lines, microwave radio relay structures, and necessary mechanical appurtenances are hereby excepted from the height regulations of this section and may be erected in accordance with the other regulations or ordinances of the Town of Lowell.