em·place·ment
noun/ɪmˈpleɪsmənt/
/ɪmˈpleɪsmənt/
(specialist)- a position that has been specially prepared so that a large gun can be fired from it
炮台；炮位 Oxford Collocations DictionaryEmplacement is used after these nouns:- gun
Word Originearly 19th cent.: from French, from em- ‘in’ + place ‘a place’.