plumb line
pl: plumb lines
Related Words
plumbverticalperpendiculargravityweightbobstringcordlinealignmentlevelmasonryconstructionarchitecturecarpentrybuildingwallcolumnpillarfoundationstraightuprightplummetdepthmeasurementprecisionaccuracystandardbenchmarkangledegreeslopegradientinclinationdeviationbalanceequilibriumverticalityaxiscentersymmetrygeometryphysicsmasstensionpendulumoscillationdropfalldownwardzenithnadirleadmetaltoolinstrumentgaugecalibrationsurveyingtheodolitetransitblueprintstructureframestudjoistbeamplasteringbrickwork