box-main-girder

基本解释

Obique bridge is made up of main girder crossbeam and bridge floorings.
斜交桥由相互斜交的主梁、梁及桥面板组成,结构受力复杂。
Access platform and ladders are proveide all along the main girder and noses.
沿主梁,鼻梁设工作平台及人梯。
The beam is divided in 4 parts, two each sitting on each main girder.
箱梁分为4个部分，每根主梁上2个。
The main girders support I-section transverse ribs.
主梁支承着工字梁的横向肋。
Mobile belt tail pieces' pedestal main girder is a main support of the ambulant components and stageloaders.
自移机尾基架主梁是小车和转载机机头的主要支撑体。