Abstract: A barrow includes a cart frame having a pair of front wheels rotatably mounted on a front or bottom portion of the frame, and a pair of middle wheels slidably mounted on a middle portion of the frame by a linkage pivotally connecting the frame and the middle wheels, whereby upon an erection of the frame, the middle wheels will be downwardly collapsibly folded; and upon a lay-down of the frame, the middle wheels will be slidably extended for evenly supporting a load carried on the frame in cooperation with the front wheels.

Abstract: An electrical connector having a wire-holding plug for holding a plurality of insulated wires with their bare ends protruding inwardly or rearwardly, a conducting coupler made of electrical conductive material squeezably enclosing the bare wire ends protruding from the plug, and a protective cap embedded with the conductive coupler and engageable with the plug, so that upon an insertion of the wire-holding plug containing the wires to be connected into the protective cap, the bare wire ends protruding from the plug will be squeezably surrounded by the conductive coupler within the protective cap for a convenient electrical connector.