The results of experiment also show the improved groove is better than V type groove and can assure the quality of welding.
试验结果表明：改进型坡口优于V型坡口，利于保证和提高焊缝质量。
The results of experiment also show the improved groove is better than V type groove and can assure the quality of welding.
试验结果表明：改进型坡口优于V型坡口，利于保证和提高焊缝质量。
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