42 design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in laboratories; design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of cleanroom air purifiers for use in laboratories; design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of cleanroom ceiling-recessed and ceiling-suspended lighting incorporating heating, ventilation and air conditioning (HVAC) systems for use in laboratories; design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of cleanroom laminar air flow work benches, work tables, ceiling grid systems, isolation stations for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of cleanroom work benches incorporating lighting and heating, ventilation and air conditioning (HVAC) systems for use in laboratories; design and development of cleanroom work benches incorporating lighting and heating, ventilation and air conditioning (HVAC) systems for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of cleanroom work benches incorporating lighting and heating, ventilation and air conditioning (HVAC) systems for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of cleanroom isolation stations incorporating lighting and heating, ventilation and air conditioning (HVAC) systems for use in laboratories; design and development of cleanroom isolation stations incorporating lighting and heating, ventilation and air conditioning (HVAC) systems for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of cleanroom isolation stations incorporating lighting and heating, ventilation and air conditioning (HVAC) systems for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of air filters for use in laboratories; design and development of air filters for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of air filters for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of fan filter units for use in laboratories; design and development of air filters for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of air filters for use in healthcare facilities, namely, in operating rooms, patient rooms and hospital isolation rooms; design and development of air filters for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of laminar air flow systems for cleanrooms for use in laboratories; design and development of air filters for use in cleanrooms used in the manufacture of electronics, semiconductors, pharmaceutical products and medical products; design and development of laminar air flow systems for health care facilities, namely, operating rooms, patient rooms and hospital isolation rooms