| 摘要 |
<p>The device (31) has reference coils (38, 39) measuring suction force, and a color marker indicating the suction force. An actuating head (34) increases the suction force, and a compression spring i.e. helical spring, is pressed against the actuating head that is supported in a sleeve (35). A coil is arranged in the actuating head and the sleeve such that displacement of the actuating head to the sleeve is measured. A pre-tensioning lever fixes the actuating head against force of the helical spring. The actuating head is pressed downward in the sleeve that is fixed at a housing (32).</p> |
