"''Walrus''-class" . "''Walrus'' class" . "Walrus-class submarine" . "''Walrus''" . . . "8.4" . "Walrus class" . "Walrus Class" . . . "6.6" . . "Walrus-class submarine" . . "24.076" . "''Walrus''-class submarines" . . "67.73" . . . "1.9E9" . . "2.65E9" . "2.35E9" . . . . .