The method and the condition of separation epoxy ethane from dihydric alcohol are described.介绍了环氧乙烷与二元醇的分离方法和条件.The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been i...
红外产品标配原装进口LED发光管, 打光均匀, 寿命长.Imported product comes standard with IR LED light tube, lighting uniformity, long life.在砷化镓衬底上异质外延磷化镓的表面缺陷与绿色发光管 ( 摘要 )Surface Defects of Heteroepitaxial Layers of GaP on GaAs Substrates and G...
He casts up his accounts at the end of each day.每天结束时他都结一次账.The tree casts a shadow on the ground.树的影子映在地上.Peony casts the other flowers into the shade.牡丹使其他的花逊色....