PNU 220 · Pneumatic and Hydraulic Control
Session 3 · Hour 1 · Which way
Instructor cue 첫 불 옆에 선다.
90 minNow Open · 5 min left · next Demo

Which way. A spool.
CheckPoint at three valves. Say which door each one is. If you say color, sit down. A regulator is not a relief. One keeps. One dumps.