| 摘要 |
1,223,433. Subaqueous drilling. J. C. STORM. 2 Jan., 1968 [29 March, 1967], No. 48256/69. Divided out of 1,223,431. Heading E1F. The subject matter of this Specification is identical with that described in Specification 1,223,431 but the claims relate to the drilling platform |
