After using that burner, the boiler safety, economic and long period operation were secured further.

改用该燃烧器后，进一步保证了锅炉安全、经济和长周期运行。

youdao

After using that burner, the boiler safety, economic and long period operation were secured further.

改用该燃烧器后，进一步保证了锅炉安全、经济和长周期运行。

youdao