maceral magma magma-chamber magnetic exploration magnetic method magnetic prospecting magneto-hydro-dynamic thermal power station main busbar main generator maltha management forecast of a system manipulator manned substation manometric delivery head marginal cost marginal cost method marginal well mass mass coefficient of reactivity mass number mass Trombe wall master substation materials processing reactor materials testing reactor material testing reactor maximum capacity maximum demand maximum demand required maximum discharge maximum electric capacity maximum excess reactivity maximum load maximum operating flow maximum output capacity maximum resources maximum throughput maximum usable flow mean energy capability mean size

mean year mechanical use medium voltage medium voltage consumer medium voltage tariff mercurisation test mercurization test mesh meshed network meshed system mesh impedance matrix mesh substation meter meter charge meter rent methane methanol methyl alcohol metre metric ton MHD power station mho micro-wave heating middlings migration mimic diagram mine mineral and fossil fuel mineral and fossil fuel deposit mineral deposit mineral naphtha mine shaft minimum capacity minimum demand minimum payment clause minimum runoff year minimum safe output of a unit

mining minute minute angle mixed oxide fuel mixed phase layout mock-up reactor moderation moderator moderator control mogas moisture content mole monofuel monogole monopolar DC link monopolar d.c. link monopropellant moonpool moonwell motive power tariff motor motor fuel motor gasoline motor oil motor set motor spirit moving sieve jig mud flush multigroup model multiple benching operations multiple fault multiple tariff