diff --git a/EMkMachiningGeoConst.h b/EMkMachiningGeoConst.h
index 75b3ccd..6637b1a 100644
--- a/EMkMachiningGeoConst.h
+++ b/EMkMachiningGeoConst.h
@@ -53,9 +53,10 @@ static std::string MCH_PV_DOWN_RCUT = "DRCUT" ;
 static std::string MCH_PV_DOWN_RRCUT = "DRRCUT" ;
 static std::string MCH_PV_DOWN_RLICUT = "DRLICUT" ;
 static std::string MCH_PV_DOWN_RLOCUT = "DRLOCUT" ;
-// Chiave info con WidthT e DeltaT lama in Preview
+// Chiave info con WidthT, DeltaT e ExtraCut lama in Preview
 static std::string MCH_PV_KEY_WT = "WT" ;
 static std::string MCH_PV_KEY_DT = "DT" ;
+static std::string MCH_PV_KEY_EC = "EC" ;
 // Chiave info per rinvio a preview spostato nel pezzo in Preview
 static std::string MCH_PV_KEY_RELOCATE = "PvId" ;
 // Chiave info per angoli in XY con entità successiva e precedente