The chemical industry occupies an important position in the national economy of various countries and is the basic industry and pillar industry of many countries.
The electric power industry provides basic power for industry and other sectors of the national economy, and is the leading sector for the development of the national economy.
The chemical industry occupies an important position in the national economy of various countries and is the basic industry and pillar industry of many countries.
The development prospects of natural gas are considerable, and the demand for olefin gas valves is very large. Natural gas is a very promising clean and high-quality energy.
The electric power industry provides basic power for industry and other sectors of the national economy, and is the leading sector for the development of the national economy.
The chemical industry occupies an important position in the national economy of various countries and is the basic industry and pillar industry of many countries.
