A drum (also called a barrel) is a cylindrical shipping container used for shipping bulk cargo. Drums can be made of steel, dense paperboard (commonly called a fiber drum), or plastic, and are generally used for the

Manufacturing technique Fireproof rockwool sandwich board and its production process realize the composite of rockwool and steel plate into a whole through automated equipment in the

According to the anti-theft security level is divided into 4 levels, respectively, A, B, C, D four levels from high to low, decreasing in turn. technical

Engineering discipline Steel structure bridge construction specifications include the following: 2, the length and weight of the component should be combined with the reported installation scheme,

Exterior wall decoration board is a new type of building exterior wall decoration and insulation integrated material developed in recent years. The material is composed of