Show Delay DeIy Pullman Strike V WASHINGTON ASHINGTON March 26 UP liP liP- The national mediation board said Saturday it has intervened in a wide nation-wide strike of Pullman conductors conductors conductors con con- set for March 31 This means an indefinite postponement of the walkout If the dispute is not settled and the 2100 Pullman conductors eventually eventually even even- strike it probably will mean meana a a. complete withdrawal of Pullman Pullman Pullman Pull Pull- man cars from the nations nation's trains trams The order of railway conductors conductors tors tons called the strike e. e Its grievances grievances grievances ances are over pay and working conditions under the unions union's con con- tracts |