preliminary estimatepreliminary investigationpreliminary planpreliminary reconnaissancepreliminary studypreliminary surveypreloadpreloadingpremarkingpremature failureprepacked concretepreplaced aggregate concretepreplaced aggregatesprescribed mixpresoaking of aggregatepresspressed brickpressurepressure bulbpressure cellpressure centerpressure coefficientpressure curvepressure distribution coefficientpressure dragpressure gaugepressure gradientpressure headpressure icepressure linepressure pilepressure prismpressure reducing valvepressure surfacepressure surface contourpressure surgepressure tankpressure tendencypressure tunnelpressure vesselpressure void ratio curvepressure weldingprestrainprestressprestress lossprestressedprestressed concreteprestressingprestressing forceprestressing tendon