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The types VHVT-6 welded joint heat-treater simultaneously is suitable for stress-relieving at six, the VHVT-8 at eight and the VHVT-12 at twelve different welded joints. Heating the welded joints and their peripheries until a given degree, during a given lapse of time and then cooling it at a given speed can be carried out with accuracy and precision.
16 staged heat-treating can be carried out with the modern microprocessoral controlling at every channel. The procedure of heat-treating can be registered and printed out with computer.
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