Considering its colourable and castable nature, its extended hardness range, low wear and superior load bearing capacity, polyurethane is a smart substitute for rubber.

考色和料的性质，选择具有更大硬度范围，低磨损，优越承载能力的聚氨酯代橡胶是明智的。

The statue of General Sedgwick, cast from cannons captured by the VI Corps which he commanded during the Civil War, has rowel spurs that turn.

塞吉维克的塑像由一门他在内战中领导的六团缴获的大而成，周围是马刺上的小齿轮。