File:Bec de gaz.png - Wikimedia Commons
BEC BUNSEN CARTUS GAZ ISOLAB
![Bec Teclu Winlab, gaz propan [320301221] - , Winlab - Libraria Romana](https://www.librariaromana.ro/images/products/librariaromana.ro/bec-teclu-winlab-gaz-propan-none-winlab-add-3.jpg "Bec Teclu Winlab, gaz propan [320301221] - , Winlab - Libraria Romana")
Bec Teclu Winlab, gaz propan [320301221] - , Winlab - Libraria Romana
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