brake pipe gradient

例句：

1. 1.The brake pipe gradient is critical for maintainingthe vehicle's stability.
   制动管坡度对于保持车辆稳定性至关重要。
2. 2. The engineer adjustedthe brake pipe gradient to improve the braking performance.
   工程师调整了制动管坡度以改善制动性能。
3. 3. The brakepipe gradient was measured usinga special device to ensure accuracy.
   使用特殊设备测量制动管坡度以确保准确性。