Charles Janin eBooks
eBooks di Charles Janin
Gold Dredging in the United States. E-book. Formato PDF
Charles Janin
edizioni Forgotten Books collana , 2017
Types of hand drills; Empire drill; New type of light power drill; Determining period of dredging project; Selection of dredge for a given project; Use of unusual type of drill in Alaska; Details of construction of gold dredges; Determining suitable size of dredge; Bucket line and tumblers; Pins; Lower tumbler; Upper...