نتایج جستجو برای: diamond core drill
تعداد نتایج: 240568 فیلتر نتایج به سال:
Femtosecond laser writing is applied to form Bragg grating waveguides in the diamond bulk. Type II waveguides are integrated with a single pulse point-by-point periodic laser modification positioned toward the edge of the waveguide core. These photonic devices, operating in the telecommunications band, allow for simultaneous optical waveguiding and narrowband reflection from a fourth-order grat...
Abstract For a drill bit, the cutter is most important part to break rock. In oilwell drilling, polycrystalline diamond compact (PDC) bit widely used shear rock formation. this paper, finite element model with including axe-shaped PDC and formation developed study breaking behaviours. Results show that effect of on better than planar cutter. The front rake angle face angel play significant role...
INTRODUCTION Type I laryngoplasty has become the most dependable procedure for the management of anterior and midglottic incompetence since its classification by Isshiki in 1974. Many procedure variations have emerged, including the development of numerous techniques, implants, and prefabricated systems increasing the utilization of medialization laryngoplasty. Sharp dissection of the cartilage...
Using the transverse processes of fresh porcine lumbar spines as an experimental model we evaluated the heat generated by a rotating burr of a high-speed drill in cutting the bone. The temperature at the drilled site reached 174 degrees C with a diamond burr and 77 degrees C with a steel burr. With water irrigation at a flow rate of 540 ml/hr an effective reduction in the temperature was achiev...
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