roadbed; subgrade
Civil engineering term for the prepared foundation layer of a road or railway, below the surface course.
Construction of the roadbed for the new road has begun.
lines on a Go board; board size
Used as a counter to specify the number of lines on a Go board, e.g. 9路盤 means a 9×9 board. Domain-specific Go terminology.
Beginners often learn Go on a 9×9 board.
Compound of 路 (road, path) and 盤 (board, base). The roadbed sense derives from the idea of a foundational layer for a road, while the Go sense comes from the board-like grid of lines.