1. On drawings, abbr. for beams and stringersĀ
2. On drawings, abbr. for bell and spigotĀ
3. On drawings, abbr. for Brown and Sharpe gauge.
1. On drawings, abbr. for beams and stringersĀ
2. On drawings, abbr. for bell and spigotĀ
3. On drawings, abbr. for Brown and Sharpe gauge.