gamma back-scatter thickness meter gamma emitter gamma, n-beryllium content mete gamma radiation gamma rays gas gas anchor gas bubble gas-cap gas-cap drive gas-cooled reactor gaseous fuel gaseous fuel boiler gaseous waste gas field gas holder gasification gasification gas insulated metal-enclosed substation gas oil gas-oil ratio gasoline gasoline plant gasoline station gas reactor gas sand gas turbine generating set gas turbine set gas turbo-generator gas turbo-generator set generating set generating unit generation of electricity generation schedule generation system generation time

generator geodetic delivery head geologist geometrically safe geophysical prospecting geostrophic wind geothermal energy geothermal flow geothermal fluid geothermal gradient geothermal hot water field geothermal hot water reservoir geothermal potential geothermal power plant geothermal power station geothermal steam field geothermal steam reservoir geothermal warm water field geothermoelectric power getting geyser glasshouse effect global radiation global solar radiation glove box go-devil graveyard gravimetric prospecting gravity arch dam gravity dam Gray apparatus Gray's tester green energy greenhouse effect grid

grindability grinding grizzly gross average heat rate of a unit gross calorific value gross head of a hydroelectric power station gross installed capacity gross output of a power station gross output of a set gross thermal efficiency of a unit gross ton ground ground cable ground conductor ground electrode grounding grounding for work grounding network grounding system ground lead ground plate ground rod ground storage ground strip ground system ground terminal ground (to) ground wire ground-wire