Supply bore holes

The installation of electromagnetic systems into the mold is very simple and clearly more cost-effective than installing a conventional needle drive. No supply bore holes have to be drilled into the clamping plate. The control of the electromagnets is very... 

There are, however, a variety of other sources of methane that have been considered for fuel supply. Eor example, methane present in coal (qv) deposits and formed during mining operations can form explosive mixtures known as fire damp. In Western Europe, some methane has been recovered by suction from bore holes drilled in coal beds and the U.S. Bureau of Mines has tested the economic practicaUty of such a system. Removal of methane prior to mining the coal would reduce explosion ha2ards associated with coal removal. As much as 11.3 x 10 (400 trillion (10 ) cubic feet or 400 TCE) of... 

Water extraction from bore holes and river beds for water supply and irrigation... 

Water from towns main supplies is usually suitable for the preparation of water-based cutting fluids. That from factory bore holes is also generally suitable, although occasionally it contains excessive amounts of corrosive salts. Water from rivers, canals and ponds usually contains undesirable contaminants, and should be tested before use. A good first test is to mix a small quantity of emulsion and allow it to stand for 24 hours in this time, no more than a trace of the oil should separate. If serious separation occurs, the water should be analyzed to indicate the sort of remedial treatment required. 

Heikkila K. (2008). Environmental evaluation of an air-conditioning system supplied by cooling energy from a bore-hole based heat pump system. Building and Environment, 43(1) 51-61. 

In order to initiate a reactor scram, the power supply to the drive is interrupted, thus causing the rod to drop freely into its lowest position in the bore holes of the side reflector due to gravity. Eighteen small sphere shutdown units serve to compensate the reactivity increase due to a cold, unpoisoned core. Graphite spheres with a 10% B4C content and a diameter of approx. 10 mm are used as shutdown elements. The spheres, which are stored in storage containers located above the top thermal shield and over the side reflector, drop freely into the reflector bore holes on demand. 

An untreated strip of at least 10 m width should be left next to all watercourses, and sluny should not be applied within at least 50 m of a spring well or bore-hole that supplies water for human consumption or is to be used for farm dairies. 

The temperature control tube (Figure 2.88) is introduced into a core bore hole and is supplied by a feeding unit. The temperature control medium (e.g., water or air) flows through the tube, exits at the front side, and flows between the core bore hole and the temperature control tube back into the outlet. 

In the science laboratory of the University of Chicago worked Robert Andrews Millikan, a man about C.T.R. s age. He had carefully read accounts of the work already done in the Cavendish Laboratory at Cambridge. Then he set to work to construct a new piece of apparatus. It consisted of two brass plates about one-third of an inch apart. In the center of the upper plate he bored a hole the diameter of a needle, and illuminated the space between the plates by a powerful beam of light. He connected the brass plates to a battery which supplied ten thousand volts. 

Fukuda et al [2] used cathodic protection by imposed current to control wear of tools used for boring of wet wood. For this, they pressed a steel plate on one side of the wood workpiece. Care was taken to electrically insulated the steel plate from the frame of the boring machine. A DC power supply was used to pass a current ranging approximately from 1 to 30 mA from the tool (negative pole) to the plate (positive pole) through the wet wood. Tool evaluations after a constant number of drilled holes showed a reduction in wear up to a factor of 3 depending on the current passed. This was observed for cemented carbide, high-speed steel and alloyed steel tools. 

---