. . "National Filling Factory No. 6" . . . . . . . . . "Largest Shell Factory" . "explosion" . . . "134 people were killed" . . "National Shell Filling Factory, Chilwell" . "Chilwell" . . "shell factory" . . . . . . . "Chilwell Ordnance Factory" . . . "National Shell Filling Factory No. 6" . . . "National Shell Filling Factory, Chilwell" . . . "National Filling Factory No 6" . "National Shell Filling Factory" . . . .