No building, structure or premises shall be used and no building or structure shall be erected or structurally altered except for the following uses:
a.
Offices for executive, administrative, professional and business purposes;
b.
Scientific or research laboratories, provided that all activities and equipment associated with the principal use are housed within the principal structure(s);
c.
Fabrication and assembly of products, but not including uses which require operation of grinders, scalers, drop drainers or for uses involving chemical restructuring of materials;
d.
Processing and printing facilities for finished products or materials;
e.
Commercial recreational uses limited to tennis, racquetball and swimming facilities.