首页>
外国专利>
the vorwaermung wind for schachtoefen, especially kupoloefen, certain recuperator, the three perpendicular interlocking concentric tubes is raised, the centrally located in a cylindrical chamber with a distance from the wall are arranged
the vorwaermung wind for schachtoefen, especially kupoloefen, certain recuperator, the three perpendicular interlocking concentric tubes is raised, the centrally located in a cylindrical chamber with a distance from the wall are arranged
