In the preprocessing phase, blocks are decompressed and/or decrypted if necessary. The compressed blocks in bzip2 can be independently decompressed, without having to process earlier blocks. There is no limit to the length of data that can be compressed or decompressed. Blocks are divided into segments that must be decompressed sequentially in order. The ulnar nerve may also be decompressed surgically. It adds support for transparently decompressed, read-only block devices. When decompressed, the audio signal is an exact replica of the original. The offset is the shift from the current position back to the already decompressed stream. They are decompressed during search and retrieval. The diver is later decompressed to on oxygen, then slowly returned to surface pressure. When the diaphragm is decompressed, the chamber refills with air. The divers were successfully decompressed from each exposure. At query time only half a block will need to be decompressed on average. However, the emergency physicians at the hospital in Graz again decompressed Hasenmayer too quickly. Hill and Greenwood decompressed themselves without serious symptoms after exposure to .