B311304255 同步环 Synchronous loop
DZ95259510421 管状横梁总成 Tubular beam assembly
DZ96259800031 左前伸梁 Left forward beam
DZ96259800033 首横梁总成 Beam assembly
DZ96259800032 右前伸梁 Right forward beam
16S151 副箱同步器总成 Sub box synchronizer assembly