在底浆层、面浆层中的至少一层的内侧表面还设有由防伪材料构成的防伪层。
An antifake layer made of the antifake material is arranged on the inner surface of at least one layer in the bottoming coat layer and the starch glue layer.
本发明通过在底浆 层与面浆层之间设置射频防伪材料及防伪层,具双重防伪性能,性能更优异。
The invention has a double antifake function and excellent performance by arranging the radio frequency antifake material and the antifake layer.
美,包浆完美,版底无瑕,征集自资深钱币藏家。开创中国钱币新局面,具有。
The United States, it is perfect, flawless plate bottom, collected from senior coin collectors. To create a new situation of Chinese coins, with.
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