For the best answers, search on this site https://shorturl.im/aQnO1. The standard atmosphere (symbol: atm) is an international reference pressure defined as 101325 Pa and formerly used as a unit of pressure.
stringer - a member of a squad on a team; a first stringer; a second stringer. team, squad - a cooperative unit (especially in sports) player, participant - a person who participates in or is skilled at some game.
The wood or glue lamination point usually in the center of surfboards. Wood stringers will add a slight bit of weight but will give the board much more strength. Most stringers are single laminations down the center of the surfboard. Some classic or older surfboards have three stringers for additional strength but also additional weight.