tungsten filaments钨丝A new method for seam tracking using image centroid in gas tungsten arc welding is presented.研究一种基于图像质心识别的电弧焊焊缝跟踪新方法.Tungsten has the highest dian of all metals: 3400 centigrade.钨在所有金属中具有最高的熔点,达到了3400...
The remnant nebular gas pervades the interplanetary space.星云的残余气体充斥星际空间.Geometry of an interplanetary CME on October 29,2003 deduced from cosmic rays.根据宇宙射线推论的2003年10月29日行星间CME的几何学.Interplanetary missile attacks do not c...