A valve assembly for liquid containers includes a base fixed on the water bottle and a connector unit which is connected to the base by a locking member. Vertices of the object are replicated into a large buffer and are modified so as to be bound to different transformation matrices in a matrix palette. The PCR products are compared with a DNA sequence database to obtain the identity of the microorganisms. The trailer includes a rectangular frame which is mounted on a pair of wheels and a T-shaped member. Subscribing client hosts in the multicast reception group simply subscribe to the single virtual host as the source of a multicast channel. The processor, in response to the content copy instruction, is also to copy the selected content to the target page in the protected region of the application address space.