| 摘要 |
1,211,037. Jib cranes. RUSTON-BUCYRUS Ltd. 25 Jan., 1968 [1 Feb., 1967], No. 58229/69. Divided out of 1,211,036. Heading B8B. The subject matter of this specification is substantially the same as that relating to the first embodiment described in Specification 1,211,036 but the claims are directed to the structure of the boom sections. |
