EB 8331-66 – pièces détachées interchangeables

Mouvement EB 8331-66

Quelles pièces détachées conviennent au mouvement EB 8331-66 ? Pour chaque pièce, vous voyez quels autres calibres utilisent la même pièce selon la liste d'interchangeabilité originale.

28Pièces avec indication d'interchangeabilité

56Calibres avec pièces communes

Remarque : Nous avons établi cet aperçu en toute bonne foi et au mieux de nos connaissances, sur la base des listes d'interchangeabilité originales de EB et des étiquettes originales des pièces détachées. Toutes les indications ont été soigneusement vérifiées, mais sont fournies sans garantie. Veuillez vérifier vous-même l'interchangeabilité avant le montage, en particulier la hauteur, le diamètre et l'exécution de la pièce.

🔧 Pièces interchangeables

N° de pièce	Désignation	Convient aussi à
163/1ISO 80.400	Tube de centre	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67 Hauteur 135 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67
181/1ISO 20.040.06	Barillet pour bonde percée avec roue entraîneuse / pignon entraîneur	EB 8320 2e EB 8320-66 EB 8321 EB 8321-66 EB 8330-66
197ISO 20.070.06	Bonde et rochet rivés	EB 8320 2e EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67
199ISO 20.062	Axe de barillet	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
203ISO 30.012	Roue intermédiaire	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
210ISO 30.025	Roue moyenne	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67 selon l'étiquette originale EB 8320 EB 8321 EB 8330-66 EB 8340 EB 8341 EB 8350 EB 8361 EB 8370 EB 8371-67 EB 8381
227ISO 30.027	Roue de séconde au centre	EB 8321 EB 8321-66 EB 8321-67 EB 8331-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67 Hauteur 564 EB 8321 EB 8321-66 EB 8321-67 EB 8331-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67
243ISO 31.081	Chaussée non lanternée	EB 8321 EB 8321-66 EB 8321-67 EB 8331-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67 Hauteur 215 EB 8321 EB 8321-66 EB 8321-67 EB 8331-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67 Hauteur 245 EB 8321 EB 8321-66 EB 8321-67 EB 8331-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67
250ISO 31.046	Roue des heures	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8370 EB 8370-66 EB 8370-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67 Hauteur 117 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8370 EB 8370-66 EB 8370-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67 Hauteur 150 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8361 EB 8361-66 EB 8361-67 EB 8370 EB 8370-66 EB 8370-67 EB 8381 EB 8381-66 EB 8381-67 EB 8391-66 EB 8391-67
260ISO 31.041	Roue de minuterie	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
307ISO 40.301	Raquette avec porte-piton mobile, pour spiral plat	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67
311ISO 70.800	Coqueret empierré	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67 EB 9391-67
330ISO 70.801	Plaque de contre-pivot empierrée	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
401ISO 51.010	Tige de remontoir	EB 8320 EB 8320-66 EB 8321 EB 8321-66 EB 8330-66 EB 8340 EB 8340-66 EB 8341 EB 8341-66 EB 8350 EB 8350-66 EB 8354-66 EB 8361 EB 8361-66 EB 8365-66 EB 8370 EB 8370-66 EB 8374-66 EB 8376-66 EB 8381 EB 8381-66 EB 8385-66 EB 8387-66 EB 8391-66 EB 8395-66 EB 8397-66
407ISO 31.121	Pignon coulant	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
410ISO 31.120	Pignon de remontoir	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
420ISO 31.023	Roue de couronne	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
425ISO 51.120	Cliquet	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
430ISO 61.080	Ressort de cliquet	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
435/1ISO 51.050	Bascule-ressort de pignon coulant	EB 8320 EB 8320-66 EB 8321 EB 8321-66 EB 8330-66 EB 8340 EB 8340-66 EB 8341 EB 8341-66 EB 8350 EB 8350-66 EB 8354-66 EB 8361 EB 8361-66 EB 8365-66 EB 8370 EB 8370-66 EB 8374-66 EB 8376-66 EB 8381 EB 8381-66 EB 8385-66 EB 8387-66 EB 8391-66 EB 8395-66 EB 8397-66
443/1ISO 51.080.06	Tirette, montée	EB 8320-66 EB 8321-66 EB 8330-66 EB 8340-66 EB 8341-66 EB 8350-66 EB 8354-66 EB 8361-66 EB 8365-66 EB 8370-66 EB 8374-66 EB 8376-66 EB 8381-66 EB 8385-66 EB 8387-66 EB 8391-66 EB 8395-66 EB 8397-66
450ISO 31.100	Renvoi	EB 8135 EB 8137 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 2e EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67 1re exécution EB 8115 EB 8135 EB 8137 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 2e EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
790ISO 30.041	Roue d'échappement pivotée	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
792ISO 41.101.41	Axe de balancier pour plateau	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67
793ISO 40.054	Balancier avec plateau et spiral	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67
794ISO 40.055	Balancier avec doigt et spiral	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340
799/4ISO 40.123	Petit plateau	EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67
821/792ISO 40.101.26	Axe de balancier pour plateau et pour dispositif amortisseur	EB 8135 EB 8137 EB 8155 EB 8157 EB 8175 EB 8177 EB 8320 EB 8320-66 EB 8320-67 EB 8321 EB 8321-66 EB 8321-67 EB 8330-66 EB 8330-67 EB 8331-67 EB 8340 EB 8340-66 EB 8340-67 EB 8341 EB 8341-66 EB 8341-67 EB 8350 EB 8350-66 EB 8350-67 EB 8354-66 EB 8354-67 EB 8361 EB 8361-66 EB 8361-67 EB 8364-67 EB 8365-66 EB 8365-67 EB 8370 EB 8370-66 EB 8370-67 EB 8371-67 EB 8374-66 EB 8374-67 EB 8376-66 EB 8376-67 EB 8381 EB 8381-66 EB 8381-67 EB 8385-66 EB 8385-67 EB 8387-66 EB 8387-67 EB 8391-66 EB 8391-67 EB 8395-66 EB 8395-67 EB 8397-66 EB 8397-67 EB 8398-67

Source : listes d'interchangeabilité originales de EB (transcription vérifiée) et étiquettes originales vérifiées · état au 28/10/2026. Hauteur / exécution : la pièce ne convient que dans cette hauteur ou exécution.

🌀 Ressort de barillet correspondant

Dimensions du ressort pour EB 8331-66 (hauteur × diamètre × épaisseur × longueur) et ressort correspondant en boutique :

EB 8331-66: 1,55 × 7,0 × 0,08 × 260 mm (GR 4378)

🔗 Mouvements ayant le plus de pièces communes

→ Tous les calibres de EB

❓ Questions fréquentes

Quelles pièces du calibre EB 8331-66 conviennent aussi à d'autres mouvements ?

Pour le calibre EB 8331-66, 28 numéros de pièce sont répertoriés comme interchangeables. Ensemble, ils conviennent à 56 autres calibres – le tableau ci-dessous indique quelle pièce convient à quel mouvement.

Quels mouvements ont le plus de pièces communes avec le calibre EB 8331-66 ?

Le plus de pièces communes : EB 8321 (36 pièces), EB 8321-66 (36 pièces), EB 8321-67 (32 pièces).

Quel ressort de barillet convient au calibre EB 8331-66 ?

Selon le catalogue Générale Ressorts (hauteur × diamètre × épaisseur × longueur) : 1,55 × 7,0 × 0,08 × 260 mm (GR 4378, remontage manuel, crochet normal).