71371770
Nov 20, 1935
Jun 29, 1937
SIGHT INDICATOR FOR USE IN CONNECTION WITH CONDENSERS, STEAM SEPARATORS, STEAM TRAPS, AND THE LIKE, TO SHOW THE CONDITION OF RETURN FLOW OF CONDENSATE, IN ITS RELATION TO STEAM OR OTHER VAPORS, LOSS OF STEAM, FREEDOM OR FLOW AND THE LIKE
Fancy Goods