삼등통신사

Third Wireless Operator

삼등항해사

Third Officer

삼상

Three Phase

삼색등

Tri-colored Light

삼중안전유리

Triplex Safety Glass

삼추진기선

Triple Screw Vessel

삼층갑판선

Three Deck Vessel

삽입용접플랜지

Slip-on Welding Flange

상가

Grounding

상갑판

Upper Deck