diff --git a/elements/30_hydraulic/21_tanks/qet_directory b/elements/30_hydraulic/21_tanks/qet_directory
index 15fee44a0..11be94675 100644
--- a/elements/30_hydraulic/21_tanks/qet_directory
+++ b/elements/30_hydraulic/21_tanks/qet_directory
@@ -7,5 +7,6 @@
         <name lang="cs">Vodní nádrže</name>
         <name lang="it">Serbatoi</name>
         <name lang="nl">Tanks hydrauliek</name>
+        <name lang="el">Δεξαμενές</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/31_control_valves/qet_directory b/elements/30_hydraulic/31_control_valves/qet_directory
index 918dba26c..00f087d0e 100644
--- a/elements/30_hydraulic/31_control_valves/qet_directory
+++ b/elements/30_hydraulic/31_control_valves/qet_directory
@@ -8,5 +8,6 @@
         <name lang="ar">مُوزّعات</name>
         <name lang="it">Valvole di controllo</name>
         <name lang="nl">Stuurkleppen 2 standen</name>
+        <name lang="el">Βαλβίδες ελέγχου</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/31_control_valves/qet_directory b/elements/50_pneumatic/31_control_valves/qet_directory
index 918dba26c..00f087d0e 100644
--- a/elements/50_pneumatic/31_control_valves/qet_directory
+++ b/elements/50_pneumatic/31_control_valves/qet_directory
@@ -8,5 +8,6 @@
         <name lang="ar">مُوزّعات</name>
         <name lang="it">Valvole di controllo</name>
         <name lang="nl">Stuurkleppen 2 standen</name>
+        <name lang="el">Βαλβίδες ελέγχου</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/51_cylinders/qet_directory b/elements/50_pneumatic/51_cylinders/qet_directory
index 5ce2f5538..bb8909413 100644
--- a/elements/50_pneumatic/51_cylinders/qet_directory
+++ b/elements/50_pneumatic/51_cylinders/qet_directory
@@ -8,6 +8,6 @@
         <name lang="ar">اسطوانات</name>
         <name lang="it">Cilindri</name>
         <name lang="nl">Cilinders</name>
-        <name lang="el">Κύλινδροι</name>
+        <name lang="el">Έμβολα</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/81_air_treatment/qet_directory b/elements/50_pneumatic/81_air_treatment/qet_directory
index a33ee70af..01d2c4967 100644
--- a/elements/50_pneumatic/81_air_treatment/qet_directory
+++ b/elements/50_pneumatic/81_air_treatment/qet_directory
@@ -8,6 +8,6 @@
         <name lang="ar">مُعالجة هواء</name>
         <name lang="it">Trattamento aria</name>
         <name lang="nl">Luchtbehandeling</name>
-        <name lang="el">Διαχείρηση αέρα</name>
+        <name lang="el">Διαχείριση αέρα</name>
     </names>
 </qet-directory>
diff --git a/elements/60_energy/11_water/roscar-valvulas/qet_directory b/elements/60_energy/11_water/roscar-valvulas/qet_directory
index abafebe1c..bbd028e1c 100644
--- a/elements/60_energy/11_water/roscar-valvulas/qet_directory
+++ b/elements/60_energy/11_water/roscar-valvulas/qet_directory
@@ -6,5 +6,6 @@
         <name lang="pl">Zawory i złączki</name>
         <name lang="fr">Vannes</name>
         <name lang="en">Valves and Accessories</name>
+        <name lang="el">Βαλβίδες και εξαρτήματα</name>
     </names>
 </qet-directory>