Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/6821005
Is Reference of Soupape de surpression sur la tuyauterie de gaz-fr#Sense
Gas-tube pressure relief valve-en#Sense
Тръбен предпазен изпускателен вентил-bg#Sense
Ανακουφιστική βαλβίδα του σωλήνα αερίου-el#Sense