Causes is bad or when the steel tube or pipe annealing heat pressed into the surface impurities. Inclusions:
Mixed performance in the steel surface or surface cracks embedded non-metallic inclusions.
According to the production characteristics of the welded pipe in the direct seam, it is possible to eliminate the reason that the welding seam is not clean in the multi-layer welding layer.For more inclusions in the raw material and make the slag inclusion of weld, take inspection before welding material, replacement, new measures such as filler metals and fluxes.
Anyway, as long as the patients can get rid of the disturbing of fallopian tube blockage, there should be no wall between western medicine and traditional Chinese medicine. With the communication between western medicine and traditional Chinese medicine increase greatly these years, more and more doctors see the possibility of combination of western medicine and traditional Chinese medicine for the treatment of fallopian tube blockage to achieve better results, and this idea has been testified in many clinic cases.
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In the astm a53 erw steel pipe multi-wire buried arc welding, the welding speed has a large effect on weld depth and melt width, and …