amtrac

amtrac 也作 am.track

n.（名词）
A small, flatbottomed amphibious vehicle that moves by means of finned tracks and is used to carry troops from ship to shore.
水陆两用履带车辆：一种小型平底水陆两用车，靠履带带动前进，用来把军队从船上运到岸上

来源：
am(phibious)
am(phibious)
trac(tor)
trac(tor)