해중투시선

Underwater Observation Boat

해치

Hatch, Hatchway, Hatch Opening

해치덮개판

Hatch Board

해치로킹바

Hatch Locking Bar

해치빔

Hatch Beam

해치타풀린

Hatch Tarpauline

해협

Cannel

해협연락선

Cross-channel Vessel, Channel Boat, Channel Steamer

핵반응

Nuclear Reaction

핵분열

Nuclear Fission, Fission