modified cast iron

例句：

1. 1.The new car has a modified cast iron frame, which makes it more durable and efficient.
   这款新车的框架是改良铸铁，这使得它更加耐用和高效。
2. 2. The engineer used modified cast iron to make the machine parts stronger and more precise.
   工程师使用改良铸铁制造机器部件，使其更强壮、更精确。
3. 3.The construction of the bridge was made possible by using modified cast iron for its structural integrity.
   桥梁的建设得益于使用改良铸铁来保持其结构完整性。