WesTech GAC contactors can be supplied in an open-top gravity system or, more commonly, in pressure vessels. They are typically designed with a conical underdrain for convenient GAC replacement.
By contrast, the HomePod is essentially an extension of the iPhone, like an accessory. When someone asks the HomePod to open a third-party app, the request wonât go directly to the cloud, as with the Echo, but to an iPhone. As a result, developers can't write apps for the HomePod. They must create tweaked versions of existing iPhone apps.
Pseudopods are an extension of the cell that has an inside similar to the cell's insides. These structures can be used many ways. Pseudopods can be used as slow, directional, crawling structures, as seen in an ameba or a white blood cell (or a cancer cell when it turns malignant).