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Autoclaved aerated concrete

lightweight, precast building material

Pronunciation
/ˈɔdoʊˌkleɪvd ˈɛreɪtəd ˌkɑnˈkrit/
/ˈɔːtəʊkleɪvd ˈɛəreɪtɪd ˈkɒŋkriːt/