china
malaysia
singapore
thailand
indonesia
vietnam
denmark
qualification certificate of construction and installation
qualification certificate of electric power project construction
safety production license
foreign trade operation license
qualification certificate of engineering design---building class a
qualification certificate of engineering design---power class b
pressure piping design certificate
pressure piping construction certificate
quality management system certification
quality management system certification
environmental management system certification
environmental management system certification
occupational health and safety management system certification
occupational health and safety management system certification
