Board surface with lineation E146:
black squares 10cm
![Board surface with lineation E146:](/media/cache/fe/13/fe13178084ee09b79b79ba0afc9b9eac/Mat-E146_ME_XX_P01.lang.jpg)
Steel sheet for all specially-coated writing surfaces of up to a width of 300 cm and a height of 120 cm. The vitreous-enamel coating is stoved at a high temperature by a special process. The surfaces can be written on with chalk and magnets adhere to them.