Scientific apparatus for determining the water content in petroleum products; marine depth finders; surveying machines and instruments; photographic cameras, filters and flashbulbs; cinematographic cameras, film and projectors; optical cables, disc drives, filters, lenses and scanners; weighing equipment, namely, scales and balances; measuring buckets, cups, rules, spoons and tapes; signal bells, processors and whistles; computer, television and video monitors; emergency signal transmitters a...