DescriptionSharpening drill.png English: drill sharpening schema Date 19 January 2015 Source Own work Author Pedros.lol...
Derivative works of this file: Skidding harness diagram.png https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark...
DescriptionImproperly sharpened drill.png English: drill sharpening schema Date 19 January 2015 Source Own work Author Pedros.lol...
DescriptionDrill sharpening angles.png English: drill sharpening schema Date 19 January 2015 Source Own work Author Pedros.lol...
and h ; Peng-adu-an, 'a complaint/ Png-iring, 'a suite/ Png-usong, 'a as, litter ;' Peng-hulu, 'a chief/ Png-gali, 'a spade/ When the radical begins...
NEERING THE png! AND QURNAL. INING J NEW YORK. Vou. XVIL—No. 17.—Fourrn Senres. The Diamond Drill for Deep Boring, Compared tems of Boring.* BY OSWALD...
Rock Drills; Hammer Drills APPENDIX 262 J Tunnel Carriage for Drilling; Electric- Air Drill 281 APPENDIX K Rock-Drill Bits; Drill Sharpening 295...
very im- being performed. John P. Wood, Brigadier-General, Cavalry, P.N.G. PREFACE The book from which these extracts are taken, was written by...
(CC-BY-SA 3.0; see https://commons.wikimedia.org/wiki/File:Insect_collage.png). We acknowledge the original author of the work: ‘BugBoy52.40’. via the...
