Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 480
Fig. 1086. Fig. 1087. missible for tapping, and if the pipe is not of uniform thickness, is to be putthe thickest side up for this purpose. The diameters given in the table are such as can-2H H be found in stock, but other sizes will be made to
Mechanical drawing
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