| 摘要 |
1,248,269. Rocket motors. MOTORENUND TURBINEN-UNION MUNCHEN G.m.b.H. 11 Aug., 1969 [14 Aug., 1968], No. 40135/69. Heading F3A. With the object of avoiding cracking and separation of a cast and cured solid propellent from a rocket motor casing, the propellent is cured in place and in contact with the rocket casing under a high pressure comparable to the operating pressure created on ignition, so that the casing and propellent are thereby subjected to prestressing. |
