Subject to the limitations of Section 17.42.020, the following principal uses are permitted in an M-P district:

    A.    Professional and administrative offices;

    B.    Laboratory, including research, commercial, testing, developmental, experimental or other types; but excluding the manufacture, assembly, or packaging of products for distribution, except as otherwise provided in subsection C of this section;

    C.    The manufacturing, compounding, packaging, treating, fabrication, or assembly of electronic or nucleonic equipment, precision instruments, optical, or photographic goods, jewelry or pharmaceuticals;

    D.    Publishing, printing, lithographing, engraving. (Prior gen. code § 8-50.2)