Jinnge's ventilated brake drums feature an innovative double-helix fin design, increasing heat dissipation area by 40% compared to traditional ventilated drums. The fins are optimized using computational fluid dynamics (CFD) to create turbulent airflow, reducing brake temperature by 120°C during continuous braking. Made from ductile iron (QT450-10), these drums have a tensile strength of 450MPa and elongation of 10%, balancing strength and flexibility. The design is patent-protected, with test results showing they can withstand 100,000 thermal cycles without cracking, ideal for urban buses or mining trucks that require frequent braking.