68 INDUSTRY | MT 6846 miscellaneous industries | BT1 miscellaneous industries | RT optical industry [6821] | photochemistry [3606] | photograph [3221] | reprography [3231] | visual arts [2831]
68 INDUSTRIE | MT 6846 industries diverses | BT1 industrie diverse | RT arts visuels [2831] | industrie optique [6821] | photo [3221] | photochimie [3606] | reprographie [3231]