背板表面不得有划伤，折皱，脏污，油笔印，杂质等现象

背板表面不得有划伤，折皱，脏污，油笔印，杂质等现象

ผลลัพธ์ (อังกฤษ) 1:

Back surface without scratches, creases, stains, oil seal, impurities and other phenomena

ผลลัพธ์ (อังกฤษ) 2:

Back surface may not have scratches, wrinkles, dirt, oil pen and India, impurities and other phenomena

ผลลัพธ์ (อังกฤษ) 3:

The back surface shall not have scratches, wrinkle, stain, oil seal, impurities and other phenomena