. Commercial fisheries review. Fisheries; Fish trade. \ Fig. 10- Method of drilling holes in plastic pipe using 27,000- rpm. carving and engraving motor. Tabl el- Diameters and Areas nf Numb ered Drills Area Drill No. Diameter Square Inches Area X 10,000 76 ; 77 78 2 01 (1/64") 79 SO Fig. 11 - Drill set (No. 61 to No. 80) and special chuck needed for drilling plastic pipe. The chuck is part of the drill set. longer lines (lines greater thaii»the water's depth) and the
. Commercial fisheries review. Fisheries; Fish trade. \ Fig. 10- Method of drilling holes in plastic pipe using 27,000- rpm. carving and engraving motor. Tabl el- Diameters and Areas nf Numb ered Drills Area Drill No. Diameter Square Inches Area X 10,000 76 ; 77 78 2 01 (1/64") 79 SO Fig. 11 - Drill set (No. 61 to No. 80) and special chuck needed for drilling plastic pipe. The chuck is part of the drill set. longer lines (lines greater thaii»the water's depth) and these lines can be used to lift the pipe over the larger obstructions. A disadvantage of this system is that the addi- tional leadlines and floatlines must be re- moved as the pipe is hauled aboard on the hose reel and refastened each time the pipe is set out. If however, herring schools con- sistently occur in locations that make driving. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Marine Fisheries Service; U. S. Fish and Wildlife Service; United States. Bureau of Commericial Fisheries. [Washington] : National Marine Fisheries Service; [for sale by the Supt. of Docs. , U. S. Govt. Print. Off. ]
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Keywords: ., book, bookcentury1900, booksubjectfisheries, booksubjectfishtrade
