Any manufacturing, fabricating, processing and maintenance establishments, provided that such use shall not be noxious or injurious to adjoining property by reason of the production or emission of dust, smoke, refuse matter, odor, gas, fumes, noise, vibration or similar substances or conditions; provided, however, that any uses may be permitted if approved by the Board of Appeals and subject to the securing of a special permit therefor and to such conditions, restrictions and safeguards as may be deemed necessary by said Board of Appeals for the purpose of protecting the health, safety, morals or general welfare of the community.