Valves and tubes; n.e.c. in heading no. 8540 - PyST

Definition

No definition available

Concept Hierarchy

Broader Concepts 1

Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes)

Current Concept

Notes

History Notes

Concept Information

IRI

https://glossary.bonsai.uno/HS-2017/8540_89

Notation

8540_89

Status

Accepted

Concept Schemes

https://glossary.bonsai.uno/HS-2017