Design and development of a two post rotary-percussion drilling rig

Manylion Llyfryddiaeth
Cyhoeddwyd yn:	Philippine Engineering Journal Vol. 16, no. 1 (1995), 103-118
Prif Awdur:	Borlagdan, Paterno
Fformat:	Erthygl
Iaith:	English
Cyhoeddwyd:	1995
Pynciau:	Rotary percussion drills Irrigation equipment Spark ignition engines