| 摘要 |
<p>The servomotor comprises a piston assembly (9) provided with a tubular hub (25) sliding on a valve sleeve (11) provided with a return roller (51) for a flexible elongate member (40) fixed between an end wall (4', 43) of the casing and an arm (47, 48) of the piston assembly normally extending beyond the return roller (51), between the latter and said end wall.</p> |
