The coherent combination of multi - Hermite - Gaussian beams is proposed to describe the flat - topped beams.提出了用多束厄米高斯光束相干合成产生平顶光束的方法.The Y - frame drawbar is constructed from two solid beams that can bear more loads.牵引...
Investigations had revealed extensive rot in the beams under the ground floor.调查发现一层地下的横梁大面积腐烂。He bumped his head on the low beams.他的头碰到了低梁上。The beams are riddled with woodworm.这些木梁被蛀虫蛀得都是洞。...