| 摘要 |
<p>The control comprises a cylindrical internal part (10) with an external surface (12) having at least two sections of different diameters connected by a shoulder. An expansion chamber (34) defined by two shoulders (14, 24) has an opening. The supply opening (36) and/or the outlet is connected to the expansion chamber (34) by the introduction of an external collar (20). This controls the clutching to create a direct access to the proximity of the expansion chamber (34).</p> |
