In printing, a duplicate letterpress plate made from an original by electroplating.在印刷技术中, 一种用电镀方法从原版复制成的印刷版.Positive line work and letterpress must be opaque.阳像线划原图和注记必须是不透明的.Furniture: Letterpress spacing materials use...
Self - heating of two typical n - alkane ( n - heptane and n - hexadecane ) is studied by Accelerating Rate Calorimeter.研究燃油在绝热条件下的燃烧情况对实际应用中改善燃油燃烧性能,改进发动机工况等有着重要的指导意义.The heptane compound has a primary purpose as a plas...