Fry, Horace Pugh. [from old catalog] · Philadelphia · leaf 28
^ecf/or? o/yFF … Sect/on ony- Y Fig. 23. CROSS-HATCHING. 1. All portions of the object cut bya section plane are cross-hatched by lines making an angle of45°, except where otherwise shown in the Conventional StandardCross-hatchings Plate A. Cross-hatching is done after a drawingis fully dimensioned, omitting it…
Mechanical drawing
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