نتایج جستجو برای: diamond core drill
تعداد نتایج: 240568 فیلتر نتایج به سال:
INTRODUCTION The conventional CD used 10 mm drill holes associated with a lack of structural support. Thus, alternative methods such as a tantalum implant, small drill holes, and biological treatment were developed to prevent deterioration of the joint. The treatment of CD by multiple 3.2 mm drill holes could reduce the femoral neck fracture and partial weight bearing was allowed. This study wa...
The effective chemical modification and self-assembly of diamond-based hierarchical composite materials are of key importance for a broad range of diamond applications. Herein, we report the preparation of novel core-shell diamond-based nanocomposites for dye adsorption toward wastewater treatment through a layer-by-layer (LbL) assembled strategy. The synthesis of the reported composites began ...
Thin boron doped diamond (BDD) film is deposited from trimethyl borate/acetone/hydrogen mixture on Co-cemented tungsten carbide (WC-Co) micro drills by using the hot filament chemical vapor deposition (HFCVD) technique. The boron peak on Raman spectrum confirms the boron incorporation in diamond film. This film is used as an interlayer for subsequent CVD of micro-crystalline diamond (MCD) film....
Abstract According to the seafloor drill working conditions and complex formation characteristics of seafloor, this paper aims improve adaptability diamond bit coring quality. The cutter tooth design scheme impregnated is proposed, Fluent analyzes flow field drilling fluid at bottom hole. results show that cone cutting with primary assistant nozzles can directly avoid 85.33% flushing core reduc...
among the power drills ( electrical/ pneumatic/battery ) used in orthopedic surgery, battery drill has got several advantages. surgeons in low resource settings could not routinely use orthopedic battery drills (obd) due to the prohibitive cost of good drills or poor quality of other drills. “hardware” or engineering battery drill (hbd) is a viable alternative to obd. hbd is easy to procure, ru...
Antifreeze thermal electric drills have a long history of ice drilling in temperate, subpolar and polar glaciers. Shallow, intermediate and deep ice cores have been obtained in Arctic, Antarctic and on high elevation glaciers. Many merits and drawbacks of antifreeze thermal technology have been discovered over the past 25 years. A modified version of the antifreeze thermal electric ice coring d...
Three finds of diamonds on the Ingul-Ingulets domain Ukrainian Shield are considered: in breccia-like rocks Gruzke area, eclogite-like basin Ingul River and Zeleny Gayi meteorite crater. A brief description these is made, which represent their different geological genetic types. Тhe veracity diamond findings origin crystals appreciated. It shown that 8 area differ size (0.2-1.4 mm), shape, colo...
Geological records from the Antarctic margin offer direct evidence of environmental variability at high southern latitudes and provide insight regarding ice sheet sensitivity to past climate change. The early to mid-Miocene (23-14 Mya) is a compelling interval to study as global temperatures and atmospheric CO2 concentrations were similar to those projected for coming centuries. Importantly, th...
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