| 摘要 |
<p>1,098,013. Pneumatic conveyers. CHEMISCHE WERKE HULS A.G. April 15, 1965 [Nov. 17, 1964], No. 16193/65. Heading B8A. A method for gastight sealing of discharge openings below the surface of gas black (carbon black) in gas black containers in which a pressure exists which is above that pressure outside the container, wherein the height of the column of gas black above the discharge openings or auxiliary discharging equipment is maintained above 100 mm.</p> |
