Anh
base glass
parent glass
Đức
Grundglas
Mutterglas
Stammglas
Pháp
verre de base
Grundglas,Mutterglas,Stammglas /INDUSTRY,INDUSTRY-METAL/
[DE] Grundglas; Mutterglas; Stammglas
[EN] base glass; parent glass
[FR] verre de base