What does the price list of electric butterfly valve DN400 mean? The production process is to make the rubber mixture according to the formula after plasticating, and cut it into semi-finished films of certain specifications after parking, refining and calendering
Pay attention to avoid uneven thickness of finished products and movement of steel plates during pressure vulcanization process on the plate vulcanizing machine after the semi-finished products are installed
In bridge bearings, lead core bearings are in ordinary valve damping bearings