spectrum n. (pl. -tra ) 1.【物理学】谱,光谱;波谱;能谱,质谱。 2.【无线电】射频频谱;无线电(信号)频谱。 3.【心理学】(眼睛的)余像;残像。 4.〔转义〕范围,幅度;(连续的)系列。 an absorption spectrum 吸收(光)谱。 a bright line spectrum 线状光谱。 an optical spectrum 光谱。 a solar spectrum 太阳光谱。 a wide spectrum of opinion 意见的不同幅度甚大。
Methods for physical performance determination of sandy alumina . determination of - alumina content . x - ray diffraction spectrum method 砂状氧化铝物理性能测定方法. x衍射法测定-氧化铝含量
The nucleating effects of and nucleating agent on the crystallization behavior of polypropylene ( pp ) were studied by differential scanning calorimetry ( dsc ) and x - ray diffraction spectrum ( xrd ) 摘要用差示扫描量热仪和x射线衍射仪对两种类型成核剂改性的聚丙烯的结晶行为进行了表征。
X - ray diffraction spectrum , empa methods and several tests including mechanical properties , electrochemistry , corrosion wear , on - site plate hanging , the microstructure of steel has been observed and analyzed , performance has been studied , and corrosion - abrasion , fragility mechanism , and microalloy application in ferritic stainless steel have been explored comprehensively . the test results of electrochemistry , corrosion wear and on - site plate hanging have been analyzed . the analytical result shows that crsomo has enough corrosion resistance in phosphoric acid slurry because it has high chromium and low carbon 通过实验室的电化学试验、腐蚀磨损试验和磷肥厂的现场挂片试验结果分析,表明: cr30mo铁素体不锈钢高铬低碳的配合,保证其在磷酸料浆中具有足够的耐蚀性: cr30mo中( fe , cr ) _ 23c _ 6 、 ( fe , cr ) _ 7c _ 3 、 mo _ 2c 、等碳化物硬质点从基体的弥散沉淀析出可提高钢的硬度和耐磨性,使得钢在磷酸料浆中具有良好的耐磨蚀效果。