byggmaterialskiva with risks of cementartat materials as gypsum, and still for framstellning deravA building board comprises a core 31 of set cementitious material, such as gypsum, faced on at least one side by a fabric or web 33 of mineral fibres embedded in the face of the core and ...
byggmaterialskiva with risks of cementartat materials as gypsum, and still for framstellning deravA building board comprises a core 31 of set cementitious material, such as gypsum, faced on at least one side by a fabric or web 33 of mineral fibres embedded in the face of the core and ...