gate bottom rial是什么意思

网络释义

1)gate bottom rial,栏板下梁2)gate top rial,栏板上梁3)lower-deck beam,下甲板梁4)under deck girder,甲板下纵梁,甲板下大梁5)Through steel plate girder,下承钢板梁6)orlop beam,最下甲板梁