. . . "Wankel rotary engine"@en-us . . . "0"^^ . "04549721-n"^^ . . "0"^^ . "epitrochoidal engine"@en-us . . "104549721"^^ . "104372602"@en-us . "103588113"@en-us . "a rotary engine that is a four-stroke internal-combustion engine without reciprocating parts"@en-us . . . . . "Wankel engine"@en-us . "Wankel engine"^^ .