Woodwork and mechanical drawing . — 137. PLATE 78 — 138 B3 --p_M esfci _______u I/* i Dor/eli s i4 Chamfer .. _/5£ n z__a llriolOScretrSection /?•/? Fern 5t/=inD PLATE 79 139 — Vf W) m zOf nc M T z/ 5 fez J- ? X poj oipl^ ?x <\, .^ n ^^kpr -i—I M tfLW il ooj|P ft ?6 S B- ^s n? 3 <I —-<-.,- Qj

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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmechanicaldrawing