00399nam a2200145Ia 4500 220204s9999 xx 000 0 und d 0815515286 678.074:678.046.3 HEW;1 Hewitt, Norman Compounding precipitated silica in elastomers USA William Andrew 2007 NR Precipitated silica Silica filler BK 42835 42835 0 0 0 0 MAIN MAIN 2021-12-16 6 678.074:678.046.3 HEW;1 23099 2026-07-12 2026-04-13 15:22:39 2026-04-13 2022-02-14 BK