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Maurice Stanley Excell
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Slide Fasteners, Snap Fasteners, And Hook Fasteners
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Abstract
937. Excell, M. S. Jan.15. Squares.-For setting-out slopes and batters, a sheet of celluloid &c. a has a number of slits b cut in it, through which a pencil can be passed to draw lines making determined angles with the base a<1>.
GB190100937D1901-01-151901-01-15Improvements in Drawing Squares for Determining Slopes and Batters
ExpiredGB190100937A
(en)