关税同盟

customs union

mountain pass / to close; to shut; to turn off / to confine; to lock (sb) up; to shut (sb in a room, a bird in a cage etc) / to concern; to involve

customs duty / tariff

taxes / duties

like / same / similar / together / alike / with

see 衚衕|胡同[hu2 tong4]

alliance

oath / pledge / union / to ally / league, a subdivision corresponding to prefecture in Inner Mongolia