평수구역

Smooth Water Area

평수항로선

Inland Water Ship

평용접

Flush Weld

평저

Flat Bottom

평저부반폭

Half-siding

평톱니바퀴

Spur Gear, Spur Wheel

평트롤리

Plain Trolley

평판

Flat

평판용골

Plate Keel

평행류열교환기

Parallel Flow Heat Exchainger, Parallel Flow Regenerator