Collins, A. Frederick (Archie Frederick), 1869- · Boston, Small, Maynard and company · leaf 236
? ARM %2> … Fig. 73. Parts of the Exhaust Valve Mechanism standard is an arm with a hole in the end justlarge enough to let the valve rod, see C in Fig. 73,slip through it. The rocker arm D is Vie inch thick, exceptnear the middle where it bulges out to Vie inch; 222 The Boys Book of Engine-Building it is %…
Steam-engines
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