Also known as: bl., BL@
BL stands for various terms. Discover the full forms, meanings, and possible interpretations of BL across different fields and industries.
A horizontal fore and aft reference line for vertical measurements. This line is perpendicular to the vertical center line. A horizontal transverse reference line for vertical measurements. This is line is perpendicular to the vertical center line. A horizontal transverse reference line for vertical measuremnts. This line is perpendicular to both the vertical center line and fore-and-aft base line.
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