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| Home > Material |
| NB /T 47019.3-2011 Purchase technical specification for boiler and heater exchanger tubes/pipes Part3: Non-alloy and alloy steel with specifier elevated temperature properties |
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| Home > Material |
| NB /T 47019.3-2011 Purchase technical specification for boiler and heater exchanger tubes/pipes Part3: Non-alloy and alloy steel with specifier elevated temperature properties |
|
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