Classic old math reference book with green cover and pre-calculator engineering / drafting-room energy. You ignore him. You keep moving. He asked if sine sat on one side and cosine sat on the other, checked the spine for chair legs, then wondered if tangent was the guy who never stays on topic.
Hydraulic Control Systems Herbert E Merritt John Wiley Hardcover G|HC
Hydraulic Control Systems by Herbert E. Merritt is a comprehensive engineering resource published by John Wiley & Sons. This classic technical text provides in-depth analysis and design principles for hydraulic components and systems, making it an essential reference for mechanical and fluid power engineers. The book features a durable dark blue cloth-bound hardcover with gold gilt lettering on the spine and front cover. This particular copy is a later printing of the 1967 edition, maintaining its relevance for professionals and students in the field of fluid mechanics and control engineering. The exact publishing date is not available; likely post 1991. Ships from Colorado, USA.