high-duty malleable cast iron

例句：

1. 1. Thishigh-duty malleable castiron is ideal for heavy-dutyapplications.
   这种高负荷可锻铸铁非常适合重载应用。
2. 2. The construction of this bridge requiredthe use of high-strengthmalleable cast iron.
   建造这座桥梁需要使用高强度可锻铸铁。
3. 3. Due to itshigh strength and malleability, high-strength malleable castiron is widely used in industrial machinery.
   由于其高强度和可锻性，高强度可锻铸铁在工业机械中被广泛使用。