31438027retarded hemihydrate plasterPT2026-03-30 20:58:04UF31438028class B gypsum plasterNDUF31438029gypsum plaster, class BNDUF31438030hemihydrate plaster, retardedNDUF31438031plaster, class B gypsumNDUF31438032plaster, retarded hemihydrateNDBT31411236gypsum plasterPT