valve liftvalve overlapvalve pitvalve stemvalvedvalvesvalves sinivalvet tableauvalvetrainvalvotomyvalvularvalvular dehiscencevalvular heart diseasevalvulogenesisvalvulotomevamana dhautivambracevamonosvamoosevamosvampvampingvampirevampire shoppingVANvan allen beltsvan der waals forcevan lifevan type trainvanadisvancouvervancouveritevandavandalvandalisevandalismvandalisticvandalizationvandalizevandalize a bus sheltervandalousvandalsvandelvanderwalsvandetavandkvanevane screw propellervanellus gregariousvangle