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

书目详细资料
发表在:	Philippine Engineering Journal Vol. 16, no. 1 (1995), 103-118
主要作者:	Borlagdan, Paterno
格式:	文件
语言:	English
出版:	1995
主题:	Rotary percussion drills Irrigation equipment Spark ignition engines