GB/T 1246-1976
AbolishedRailway turn out number series
铁路道岔号数系列
Application Summary AI generated
This standard specifies the numerical series for railway turnouts, defining the frog numbers (e.g., 6, 9, 12, 18) that determine the crossing angle and permissible speed. It is applied in the design, manufacturing, and procurement of railway switches and crossings for standard-gauge mainline and industrial railways in China. The series ensures interchangeability and safety across different rail networks and maintenance operations.
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