| 摘要 |
A level adjustment device (10) comprises: a foot or base element (12) with a shaped part (20) and a threaded shank (24); a hollow, cylindrical operation or driving element (14), provided with female threaded parts and with a crown gear axially at one end; a support element (16) engaging in a stable manner the cylindrical operation element (14) for axial movement and having an operation window (40). By introducing the tip of a cross-pointed screwdriver of an usual type through the operation window, the cylindrical hollow element is rotated, thus moving it and the support axially along the foot element. |
