Now fold the top (ribbed) edge of the diaphragm inward, grasp the sleeve with the ribbed edge up and slide the sleeve down over the piston assembly as shown in Figure 8.

• 现在往内折叠隔膜的顶部（有棱纹的）边缘，抓住套筒并使又棱纹的边缘朝上，如图8所示滑动套筒到活塞总成的上面。