English to French Tech/Engineering Engineering (general)

Automatic hydraulic system for use with a three point pipe bending apparatus including a pair of bending beds having inboard and outboard ends (...)
wherein the automatic hydraulic system comprises:
a pin up hydraulic ram unit operatively associated with said hinge plate,
a bending bed hydraulic ram unit operatively associated with said hinge plate...

Que désigne-t-on par "bending bed" ?

Merci.