| 摘要 |
A biologically degradable mineral-fiber composition characterized by the following constituents in percent by weight: SiO2 50 to 65, Al2O3 less than 2, CaO 16 to 30, MgO 4 to 15, Na2O 8 to 20, K2O 0 to 2, B2O3 0 to 10, TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 5. |
