For an aspiration, a syringe is attached to the needle to collect a small amount of marrow. For a bone marrow biopsy, a special needle is used that allows the collection of a solid core (a cylindrical sample) of marrow.
Lottery wheeling. Lottery wheeling (also known as lottery system, lottery wheel, lottery wheeling system) is used by individual players and syndicates to distribute a subset of the possible lottery numbers across multiple tickets to ensure that at least one of these tickets will contain a winning combination if several draws are in this subset.
There are 15 Daily Numbers Drawing Wheels used for the Mid-Day and Evening drawings. Every night, a Lottery computer randomly selects four wheels to be used for the Mid-Day drawing and four wheels to be used for the Evening drawing. A fifth, alternate wheel is also selected for each drawing.