| 摘要 |
The tongs has a length adjustable link (30) that includes two parts that move in a longitudinal direction. The former part (36) includes a slot for guiding a pivot shaft (31) carried by another part (70). The shaft carries a rounded body that has mutually discrete recesses (33) disposed around its periphery. The recess (38) complimentary to the projections co-acts along the axis of the link. |
