vacuum apparatus
scope note: includes apparatus for producing, maintaining and handling vacuum per se
narrower: vacuum gauge
narrower: vacuum pump
related: vacuum technique
preferred label: دستگاه خلاء @fa
type: Concept

vacuum pump
preferred label: تلمبه خلاء @fa
type: Concept
broader: vacuum apparatus

vacuum gauge
preferred label: خلاء‌سنج @fa
type: Concept
broader: vacuum apparatus

vacuum technique
preferred label: فن خلاء @fa
type: Concept
related: vacuum apparatus