DZD40-A type bottom plate pressure meter usage instructions, uses: mainly used in coal mine single hydraulic prop pressure, pressure measurement, bottom plate pressure, no liquid supply system area support rescue, hydraulic prop repair after the pressure test. DZD40-A type bottom plate pressure meter advantages: 1, set pressurization, pressure measurement, bottom plate pressure (with pressure die) function in one, a multi-purpose. 2, do not replace the pumping station and liquid supply system, so that the initial support of the pillar reaches more than 25Ma. 3, when measuring the specific pressure of the bottom plate, use the working face pillar. Omit the original ratio...