Casings, e.g. for machines, are made from thick metal or plastic sheets with wedge-shaped or stepped recesses which reduce sheet thickness to minimum at these points and allow sheet to be folded upwards

摘要

The casings, e.g. for machines, are made from thick metal or plastic sheets (1). These have wedge-shaped or stepped recesses (3) which reduce the sheet thickness to a minimum (4) at these points and allow the sheet to be folded upwards.