Projector for the projection of transparencies held in glassless slide mounts
DE2854667A1
Damage elimination in ceramic wall and floor lining - involves injecting liq. substance into cavities through surface holes until overflow occurs
DE2754800A1
Acid resistant joint sealed ceramic panel floor - has cement from below joining resistant cement applied to panels and joints
DE2545925A1
Corrosion resistant load bearing ground paving - has acid resistant grouting combined with raised mortar bed in joints
DE2348301A1
Acid-proof ceramic tile flooring - laid on intermediate layer resting on pref. steel-reinforced concrete base, with gaps filled with acid-proof material
