单词	paleogene coalfield
释义	paleogene coalfield 古近系煤田
随便看	mechanical frequency mechanical frequency bandspread mechanical frequency stabilization mechanical friction mechanical friction clutch mechanical friction loss mechanical friction resistance mechanical fuel injection pump mechanical fuel injection timing advance device mechanical fuel injector mechanical fuel pump mechanical fuel valve mechanical function mechanical functions mechanical furnace mechanical fuse mechanical fuze mechanical gadget mechanical gage mechanical galvanizing mechanical games mechanical gantry mechanical garage mechanical gas dispersoid mechanical gasket