noun
lift bridge
A type of movable bridge where a span rises vertically while remaining horizontal, allowing tall vessels to pass underneath. Technical term used in civil engineering and transportation contexts.
この昇開橋は、大型船が通るときに橋桁が上がる仕組みになっている。
This lift bridge is designed so that the bridge deck rises when large ships pass through.
旋回橋 is a swing bridge that rotates horizontally, unlike 昇開橋 which lifts vertically.
Compound of 昇 (rise) + 開 (open) + 橋 (bridge). The term is a modern technical coinage describing the bridge's vertical-lift mechanism.