Results 61 to 70 of about 513,317 (192)
Survey of information concerning large diameter deep hole drilling [PDF]
, 1972 Data are presented, covering drilling techniques, factors affecting penetration rates, cost estimation, and system improvement.
core +1 more source
Jurnal Fisika Flux, 2017 Abstrak: Pembongkaran over burden di Pit Central PT. SIS dilakukan dengan kegiatan peledakan. Sebelum kegiatan peledakan, dilakukan kegiatan pemboran untuk penyediaan lubang ledak dengan geometri dan pola tertentu.
Didiet Try Setiadi +2 more
doaj +3 more sources
Universal router concept [PDF]
, 1970 Portable universal router can cut holes of large diameter and irregular shapes, machine recesses, and drill holes with certain edge-distance limitations.
Pesch, W. A.
core +1 more source
Iris-leaf core retainer for a surface drill [PDF]
, 1969 Iris-leaf core retainer insures retention of a complete sample within the drill string. Individual overlapping leaves will not rupture or tear out when they come in contact with the oncoming ...
Olivari, H.
core +1 more source
Drilling Processes with Hydraulic Percussion Rock Drills
Journal of MMIJ, 2017 Rock drills were developed about two hundred years ago, and hydraulic percussion rock drills are about half-century old. Performance and efficiency of rock drills have been increased by a number of researchers and engineers.
Kimihiro HASHIBA +2 more
doaj +1 more source
Hand drill adapter limits holes to desired depth [PDF]
, 1966 Adjustable adapter fastened to the shank of a drill bit limits the depth of bored holes.
core +1 more source
, 2014 textThe town of Millerton, Pa., has always been a small, rural farming community. Settled atop of the famed Marcellus Shale in the foothills of the Appalachians, there have always been rumors of natural gas in the hills around town. In 2008, natural gas
Friel, Katherine Dailey
core
Scientific ReportsGeothermal power generation employing Organic Rankine Cycle (ORC) technology is a widely acknowledged and conventional approach for harnessing geothermal energy.
Yong Qiao, Kaiyuan Shi, Junrong Liu
doaj +1 more source
Effects of Input Parameters on the Hole Quality During the Drilling of Al Metal Matrix Composites
DesignsThe extensive industrial applications of aluminum (Al) metal matrix composites (MMCs) require optimal drilling conditions in the manufacturing industries.
Alokesh Pramanik, Animesh Kumar Basak
doaj +1 more source
Noise reduction of dental drill noise [PDF]
, 2008 Dental drills produce a characteristic noise that is uncomfortable for patients and is also known to be harmful to dentists under prolonged exposure.
Atherton, MA +3 more
core