细节
A late 19th-Century brass airflow meter,
by Short & Mason, the silvered dial with three subsidiary dials, fine pointers, with ten aluminium-bladed fan, fitted with a stop and suspension loop -- 6in. (15.3cm.) dia. in leather carrying case
(2)
by Short & Mason, the silvered dial with three subsidiary dials, fine pointers, with ten aluminium-bladed fan, fitted with a stop and suspension loop -- 6in. (15.3cm.) dia. in leather carrying case
(2)