uniform updatinguniformityuniformity coefficientuniformly distributed loaduniformly gradeduniformly progressive flowuniformly progressive waveuniformly varying loaduninterrupted flowunionuniqueunitunit actionunit base vectorunit cellunit displacementunit dry weightunit elongationunit hydrographunit loadunit load methodunit matrixunit priceunit price contractunit rainfall durationunit tractive forceunit vectorunit weightuniversal jointuniversal rollunlinedunloadingunloading areaunloading zoneunlockingunpainted spotunpaved runwayunplanedunpumpableunregulated flowunreinforcedunreinforced webunrestrainedunrestrained jointunrestrained memberunrestricted kerb parkingunrestricted plastic flowunsaturatedunsaturated flowunsaturated soil