| 摘要 |
<p>A valve has a body (14), a bonnet (12), an actuator mechanism (20), and a flexible diaphragm (18) adapted to be positioned between the bonnet (12) and the body (14). The flexible diaphragm (18) has a central portion (70) and a peripheral portion (58), and the central portion is covered with a thin alloy layer (46).</p> |
