The solution of the projection on inward concave composition surface of cylinder and cone is discussed. and the critical point on the projection is calculated with analytical method.
本文着重介绍内凹的圆柱和圆锥组合面上落影的求法，并尝试利用解析的方法，求出落影上的特殊点。
Tender thin woollen fabrics, feel comfortable, including 48% wool composition, surface and slightly bright silk, low-key costly, top-grade quality.
温软的薄毛呢面料，手感舒适，含48%羊毛成分，表面还有微微亮丝，低调奢华，高档品质。
The composition, surface morphology and phase structure of the films were tested by EDXA, FSEM, AFM and XRD, respectively.
并通过EDXA、FSEM、AFM和XRD等手段，检测薄膜的成分、表面截面形貌和相结构。
The influence of bath concentrations on deposition rate, composition, surface appearance, formation range of the amorphous structure and corrosion resistance for the deposits was studied.
研究了镀液浓度对镀层沉积速率、成分、表面形貌、非晶态结构形成区域和耐蚀性的影响，得出了最佳镀液浓度及施镀条件。
The influence of bath concentrations on deposition rate, composition, surface appearance, formation range of the amorphous structure and corrosion resistance for the deposits was studied.
研究了镀液浓度对镀层沉积速率、成分、表面形貌、非晶态结构形成区域和耐蚀性的影响，得出了最佳镀液浓度及施镀条件。
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