(a) Blue print No.2198
(a) Blue print No.2198, single tube manometer for venturi meter; (b) two copies of blue print 1/2198 general arrangement of three inch venturi meter and manometer
(a) Blue print No.2198, single tube manometer for venturi meter; (b) two copies of blue print 1/2198 general arrangement of three inch venturi meter and manometer
