| 摘要 |
1,244,540. Stoppers &c. PRODUITS CHIMIQUES PECHINEY-SAINT-GOBAIN. 10 Nov., 1969 [8 Nov., 1968], No. 54849/69. Heading B8T. [Also in Division E2] In a stopper fastening, one element 1 has arms 3 having bulges 5, 6 which engage in recesses 7, 10 when fastened, thus preventing withdrawal. The arms may be separate from the fastened members 1, 2. Two sets of bulges may be used, and these may be of various shapes and staggered. |
