line of levelline of longitudeline of most gradientline of saturationline of sightline of slidingline sourcelinearlinear accelerationlinear analysislinear combinationlinear constraintlinear convergencelinear deformationlinear elasticitylinear elementlinear impulselinear loadlinear momentumlinear momentum equationlinear operatorlinear programminglinear reservoirlinear road networklinear scalelinear strainlinear structurelinear superpositionlinear systemlinear transformationlinearizing assumptionlinearlylinearly elasticlinearly elastic and isotropic materiallinearly elastic bodylinearly elastic materialslinedlined boreholelined channellined welllininglining bricklining edgelining of a tunnellining platelining warlinklink canallink polygonlink road