试验和分析表明，铸铁锅炉运行安全可靠。

The tests and analysis indicate that the safe and reliable operation of cast iron boilers can be assured.

youdao

试验和分析表明，铸铁锅炉运行安全可靠。

The tests and analysis indicate that the safe and reliable operation of cast iron boilers can be assured.

youdao