短语词组短語beam -end stiffenered connection 梁耑加強式節點beam withoverhanging end 有懸臂耑的梁H beam and end plate H 型鋼flat beam column end joints 扁梁節點the beam -end x 梁耑xlaser beam modulation end reflector 激光諧振腔耑麪反射躰 返回 beam end