| 摘要 |
<p>The wrench (1) has central middle portion (2) whose sides are provided with key arms (3-6) to which recording units are arranged for applying separate tool heads. The key arm (3,5) has inner profile (7,10) into which inner profile of auxiliary tool head (11,30) is guided axially and respectively along displacement path of auxiliary tool head between inactive position, in which inner profile of auxiliary tool head is moved into inner profile of key arm, and active position, in which auxiliary tool head is projected outward beyond inner profile of auxiliary tool head.</p> |
