Chemical, petrochemical, pharmaceutical industries – Industrial Class A; Building industry (building)– Discipline Class A; Oil and gas (off-shore oil) industry (oil and gas storage) – Discipline Class A; Special engineering, environmental engineering (waste water treatment, waste gas treatment, waste solid treatment) – Discipline Class A; Power industry (thermal power generation) – Discipline Class B; Light chemical and textile industries (daily chemical and plastic) – Discipline Class A