The result proves that the accumulate line is caused by heat treatment defect, soft troostite tape.

结果表明，活塞杆在磁粉探伤中显现的螺旋形磁粉堆积线是由热处理缺陷一屈氏体软带造成的。

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Results: useful to promote the chin and neck sides, toxin is easy to accumulate the lymphatic drainage, smooth neck skin, beautify the neck line.

效果：有用促进下巴和颈部两侧，毒素较易聚积处的淋巴引流，光滑颈部肌肤，美化颈部线条。

youdao

Results: useful to promote the chin and neck sides, toxin is easy to accumulate the lymphatic drainage, smooth neck skin, beautify the neck line.

效果：有用促进下巴和颈部两侧，毒素较易聚积处的淋巴引流，光滑颈部肌肤，美化颈部线条。

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