Abstract: Front and back doors of an apparatus cabinet have lips extending around to cover part of both cabinet sides. Both doors are hinged on one side member of the frame of the cabinet and each has a toothed tongue in the middle of its free end directed so as to slide into a dual latch mounted on the inside of the other frame member of the cabinet. In entering the latch, the door tongues are guided upwards to correct for the sag of the doors. The latch has a cross member with a detent on each end urged downward by a leaf spring and mounted on a pivot plate in a manner allowing the plate to slide upwards against the spring when both detents are pushed upwards by simultaneous closing of both doors. The doors are self-locking, whether closed individually or simultaneously. Release of the front door is performed by a finger cam, actuated from the outside, acting on the pivot plate, by means of a special wrench. The rear door is released from the inside after the rear door is opened.