半环形缝合牵引
a methodofextractionby around-anastomosis stitches
变刚度牵引拉杆
traction rod with variable stiffness
侧梁牵引座
side-beam traction holder
长度计算用牵引座前置距
fifth wheel lead for calculation of length
fifth wheel lead
地面牵引式拖车
in-floor tow line trolley
牵引高炮
Hauling anti-aircraft gun