用于石油天然气及城市燃气、热、排水输送管道的补口防腐。

The technology is studied on steel pipeline surface by hot spraying with oxygen-natural gas.

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用于强度要求不高的灰口铸铁件的焊补。

Frepair welding of grey cast iron which requires less strength.

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用于强度要求不高的灰口铸铁件的焊补。

For repair welding on general grey cast iron weldment.

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用于强度要求不高的灰口铸铁件的焊补。

For repair welding on general grey cast iron weldment.

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