求翻译：进口羊毛高速抛光会在产品表面留下很细并带艺术感的圈状线条，这属于钢琴漆工艺的特征，只有在反光及强烈灯光照射下才能看得见，这属正常现象。是什么意思？

High speed polishing of imported wool is fine and on the product surface with an artistic sense of ring-shaped line, which is a piano varnish technology features, only under strong light irradiation and reflective to visible, this is normal.