Abstract: An assembly stand that is suitable for putting railcar body units together to form a railcar body of a railway vehicle, includes an inner unit having a longitudinal beam which is present in the interior of the railcar body while the railcar body is being put together, extends along the longitudinal axis of the railcar body, and can be positioned in the interior of the railcar body.

Abstract: A ditch trenching device is adapted to be connected to earth moving equipment that use buckets. A dirt port is dimensioned in a lower portion of a bucket. A trencher is attached to the dirt port and is defined by two side members each with a front, back, top, and floor that are spaced apart the width of the dirt port; a floor member with a distal end is attached to the floors; and a back member is attached to the backs. There is an acute angle between the front and floor. A first cutting edge is placed at the distal end and a second cutting edge is connected to the front by the floor.