نتایج جستجو برای: percussion welding

تعداد نتایج: 17028  

2011
Vinod Kumar

Submerged arc welding is preferred over other methods of welding because of its inherent qualities like easy control of process variables, high quality, deep penetration, smooth finish, capability to weld thicker sections. Since the development of submerged arc welding process, welding engineers are striving for reduction in welding cost without compromise in the performance of the weld. Flux u...

2010
S. P. Tewari

In this study, the effect of various welding parameters on the weldability of Mild Steel specimens having dimensions 50mm× 40mm× 6 mm welded by metal arc welding were investigated. The welding current, arc voltage, welding speed, heat input rate are chosen as welding parameters. The depth of penetrations were measured for each specimen after the welding operation on closed butt joint and the ef...

Journal: :The American journal of medicine 1991
A N Barkun M Camus L Green T Meagher L Coupal J De Stempel S A Grover

STUDY OBJECTIVE To evaluate the clinical assessment of splenic enlargement using specific bedside maneuvers including Traube's space percussion, the splenic percussion sign, Middleton's maneuver, supine palpation, and right lateral decubitus palpation. DESIGN Quasi-experimental prospective study of cases and controls selected according to the results of abdominal ultrasonographic examinations...

Journal: :European neurology 2008
J M S Pearce

Percussion of the skull dates from a time when there were virtually no radiological methods for examining the skull and brain. Three apparently independent contributions appeared within the years 1893-1895. The sound elicited, tenderness, and auscultatory percussion have each been employed for diagnostic purposes, but have long been superseded.

2009
Todd SCHOONOVER Lorraine CONROY Steven LACEY Julie PLAVKA

The objective of this study was to characterize personal exposures to welding-related metals and gases for production welders and non-welders in a large manufacturing facility. Welding fume metals and irritant gases nitrogen dioxide (NO2) and ozone (O3) were sampled for thirty-eight workers. Personal exposure air samples for welding fume metals were collected on 37 mm open face cassettes and ni...

Alireza Halaj-Mofrad Masoud Parirokh, Nargessadat Kashi

BACKGROUND AND AIM: Surgical endodontics may sometimes fail despite using root-end filling materials (REFMs). In this case report, a symptomatic right maxillary first premolar underwent periradicular surgery (PS) for replacing huge rate of amalgam with mineral trioxide aggregate (MTA).CASE REPORT: A thirty-year-old healthy woman attended with the chief complaint of recurrent swelling and absces...

Journal: :JAMA: The Journal of the American Medical Association 1907

Journal: :Thorax 1986
C P van der Schans D A Piers D S Postma

The effect of manual percussion of the thorax in nine patients with stable chronic airflow obstruction and excessive tracheobronchial secretion has been studied. Tracheobronchial clearance was measured over 50 minutes on three different days. On the first day manual percussion was applied for 10 minutes. In the period when percussion was applied the mucus clearance was slightly but significantl...

2014
Zhihua Song

Laser beam welding has wide acceptability due to least welding distortion, low labour costs and convenient operation. However, laser welding for dissimilar titanium and aluminium alloys is a new area which is having wider applications in aerospace, aircraft, automotive, electronics and other industries. The present study is concerned with welding parameters namely laser power, welding speed, fo...

2013
Sourav Datta Ajay Biswas Gautam Majumdar

Tungsten Inert Gas welding (TIG) process is an important component in many industrial operations. The TIG welding parameters are the most important factors affecting the quality, productivity and cost of welding. This paper presents the influence of welding parameters like welding current, welding speed on strength of low carbon steel on AA1050 material during welding. A plan of experiments bas...

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