42 Designing and planning of oil refineries and chemical, petrochemical, oil, natural gas, liquefied natural gas, gas, power, and other process and industrial plants and facilities; physical testing services, chemical testing services, physical and chemical laboratory services, and analytical chemical services offered in connection with oil refineries and chemical, petrochemical, oil, natural gas, liquefied natural gas, gas, power plants, oil refinery plants, and other process and industrial plants and facilities in the chemical, petrochemical, petroleum refining, metallurgical, nuclear, plastic, and coal processing industries; engineering services in the field of chemical, petrochemical, petroleum refining, metallurgical, nuclear, plastic, and coal processing industries; consultancy and advisory services in the field of chemical process development and quality improvement; consultancy and advisory services, namely, designing and developing oil refineries, and chemical, petrochemical, oil, gas, natural gas, liquefied natural gas, power plants, oil refinery plants, and other process and industrial plants; initial start-up and initial operations support services, namely, diagnostic, testing, technological troubleshooting, evaluating, and analyzing of equipment used by oil refineries and chemical, petrochemical, oil, natural gas, liquefied natural gas, gas, power plants, oil refinery plants, and other process and industrial plants and facilities in the chemical, petrochemical, petroleum refining, metallurgical, nuclear, plastic, and coal processing industries