潜艇堡 Traditional form: 潛艇堡 Pinyin (reading): qiántǐngbǎo Definitions: submarine sandwich Characters: 潜 - to hide; secret, latent, hidden 艇 - dugout, punt, small boat 堡 - fort, fortress; town, village Traditional characters: 潛 - to hide; secret, latent, hidden 艇 - dugout, punt, small boat 堡 - fort, fortress; town, village