| 摘要 |
FIELD: shipbuilding; submarine telescopic devices. ^ SUBSTANCE: telescopic device tube has shell perforated throughout entire surface which is mounted on top end of tube. Shell is installed in a spaced relation to extensible device tube and its outer diameter equals bottom-part diameter of extensible device tube. ^ EFFECT: reduced vibration of submarine extensible device tubes. ^ 1 cl, 6 dwg |
