Pensky-Martens closed tester [ Pensky-Martens closed cup apparatus | PMCC apparatus | Pensky-Martens closed cup ]
appareil Pensky-Martens [ appareil Pensky-Martens en vase clos | appareil de Pensky-Martens | appareil de Pensky-Martens à creuset fermé | creuset fermé Pensky-Martens ]