Packaging false proof technology is surveyed in the aspect of paper, techniques and printing ink.
主要从防伪纸张、防伪技术、防伪油墨三方面对包装防伪作了概述。
As a proof of engineering practice, the method of construction techniques of cast-in-site girder of bridge could ensure the waterway of small and bridge.
工程实践证明,运用在系梁上架设现浇箱梁支架的施工方法,能够保证中小桥梁河道通航及泄洪的要求。
The present nondestructive inspection techniques are unable to recognize small flaws, the metallurgical drawbacks and tight cracks, low temperature and high pressure proof-test can do it.
目前各种无损检测技术无法确定小裂纹、紧闭裂纹和冶金缺陷,压力验证试验却能弥补这方面的不足。
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