| 摘要 |
1,269,401. Rescue shoots. G. ZEPHINIE. 16 April, 1969 [17 April, 1968], No. 19419/69. Heading B7J. [Also in Division B8] An escape shoot 10 is resilient in the circumferential direction and inextensible longitudinally so that a person descending the shoot distends it and is retarded thereby. Various methods of constructing the shoot are described. |
