| 摘要 |
<p>A rotary collar (12) has a base (13) fixed in translation relative to a container (1) and a support (14) formed with a stud (14b). Helical bearing ramps (71,72), parallel to a valve axis, are formed about a dispensing stack (7) and on the location away from the valve side. The stud engages the ramps, facilitating translation of the stack as the collar is rotated.</p> |
