United States. National Advisory Committee for Aeronautics, United States. National Aeronautics and Space Administration · Washington : G.P.O. · leaf 696
lml) of reduced pressure is a wal,er as[)iral-(»r. (oiitrol is efreeted by u nurriher ofone (M^diLli-itieh needh^ valves. Ilui nieasiiriu^ iiisl<iiiiii(;nts iiro H(jiirdori Lube dial i^nw^ita ofsuitable^ raiijjjes and a nuMHMiry inaiioineter for pressures from subatniosplieric to two… … Sec//on /J-S
Aeronautics
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