Flange working characteristics: 1, a remote control of automatic butterfly valve, at the same time with the characteristics of the flange butterfly valve, butterfly valve can be equipped with a wide diameter; 2. Power supply is the driving energy of butterfly valve. It has a wide range of power so

It can be seen that the fundamental shortcomings of these humanities views of stainless steel flanges are that the humanities or the humanities are not distinguished from the natural sciences and social sciences from the perspective of the research objects and fields. Explain the language function o