| 摘要 |
A barrel measuring device for accurate measurement of all internal dimensions and barrel wall thickness of a gun, tube, pipe or cylinder is comprised of a fixed probe transversely attached to a cross member at a distal end. A second probe transversely attached to a body member proximate to the fixed probe, said body member and second probe slidaby moveable along the axis of the cross member. A measurement device attached to the body member and second probe for recording of the diameter proportional to the degree of expansion of the fixed and second probe within the barrel. A recoil means for expansion contained with the cross member and attached to the body member coupled with the second probe providing an expansion pressure between the probes for measurement with the measuring device.
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