diff --git a/EMkMachiningGeoConst.h b/EMkMachiningGeoConst.h
index 3feb3b7..7144239 100644
--- a/EMkMachiningGeoConst.h
+++ b/EMkMachiningGeoConst.h
@@ -50,6 +50,7 @@ static std::string MCH_CL_AGB_DWN = "AGBD" ;
 static std::string MCH_CL_AGB_IN = "AGBI" ;
 static std::string MCH_CL_AGB_OUT = "AGBO" ;
 static std::string MCH_CL_AGB_UP = "AGBU" ;
+static std::string MCH_CL_DBP = "DBP" ;
 // Nomi di entità di preview
 static std::string MCH_PV_CUT = "CUT" ;
 static std::string MCH_PV_PRE_CUT = "PRC" ;