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Application filed by Janusz JanczewskifiledCriticalJanusz Janczewski
Priority to PL28598690ApriorityCriticalpatent/PL285986A4/en
Publication of PL285986A4publicationCriticalpatent/PL285986A4/en
PL28598690A1990-07-061990-07-06Method of making hollow masonry units heaving thermally insulating layer and hollow masonry unit obtained thereby
PL285986A4
(en)
Method of making gypsum and aerated gypsum hollow ceiling and wall precast units and thermally insulating boards and precast ceiling and wall units and thermally insulating boards made of gypsum and aerated gypsum