42 Engineering services in the field of oil and gas, power generation, chemical processing, pharmaceutical, pulp and paper, water, mining and food and beverage industries; engineering services in the field of pressure relief valves, safety valves, and hydraulic and pneumatic control valves in the field of oil and gas, power generation, chemical processing, pharmaceutical, pulp and paper, water, mining and food and beverage industries; engineering design services in the field of oil and gas, power generation, chemical processing, pharmaceutical, pulp and paper, water, mining and food and beverage industries