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。...
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...