In the 20th century a number of security features , ranging from embedded metal threads to intaglio printing , came into use 到了20世紀(jì),由內(nèi)藏保安線以至凹版印刷技術(shù)等防偽方法也陸續(xù)面世。
In the 20th century a number of security features , ranging from embedded metal threads to intaglio printing , came into use 到了20世紀(jì),由內(nèi)藏保安線以至凹版印刷技術(shù)等防偽方法也陸續(xù)面世。
The solution of heating expansion and cold contraction to eliminate the heating expansion and cold contraction , we embed metal mesh into ptfe liner 熱脹冷縮的解決方法:采用ptfe層中加鋼絲網(wǎng),來消除熱脹冷縮,提高強(qiáng)度,消除蠕變。
Due to their unique optical , electrical properties and potential applications based on quantum size effect , small size effect and interface effect , cermet films consisting of ceramic matrix and embedded metal nanoparticles are attracting increasing attention for both fundamental and practical reasons 作為一類新型的功能薄膜材料,由納米金屬微粒鑲嵌于陶瓷基體中所構(gòu)成的金屬陶瓷薄膜,由于量子尺寸效應(yīng)、小尺寸效應(yīng)、界面效應(yīng)而具有獨(dú)特的光電特性和良好的應(yīng)用前景,正在引起材料學(xué)界的極大關(guān)注。