aving calks It is compact and portable, and may be set up and operated that can be readily applied or removed as may be required. with very little trouble. The shoe is provided at the heel and toe with permanent This drilling apparatus is the invention of Mr. William W. lugs of wedge form, which… … used in connection with this shoe. They are held in place improvements in devices for increasing or lengthening the by pins passing through both lug and calk. throw of the connecting rod of reciprocating engines, which The form of calk may be either smooth or sharp. It has consists in the peculiar…
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