Definition ES: pieza cortante de acero acoplada al extremo de un tubo de perforación

Definition EN: a steel cutting edge fitted to the bottom of a boring tube or casing

Definition EN: part of a mechanical friction brake which acts on the disk,causing it to slow down

Definition EN: material with a high coefficient of friction and the ability to maintain its friction and strength when hot

Definition EN: metal fitted to the curve of a wheel and pressed against the wheel to secure braking action

Definition ES: una zapata cortante que se desliza sobre el tubo de perforación al principio de ésta y se abandona en el fondo de la misma cuando se retira la entubación. Es de mayor diámetro que la zapata fileteada para el mismo diámetro del tubo. Se utiliza en la arcilla dura, terrenos rocosos, etc. y para perforaciones profundas

Definition EN: a cutting shoe slipped on to the boring tube when starting boring and left at the bottom of the bore when the tube is withdrawn.It is of a larger diameter then the screw shoe for the same diameter of tube.It is useful in stiff clay,rock soil,etc.,and for deep bores

Definition ES: parte de una mina que explota un sector del criadero separado y diferenciado de los demás

Definition EN: area that can be reached,entered

Definition EN: the downstream zone of a combustion chamber in which the air not used in combustion is injected into the hot gases issuing from the combustion zone in order to achieve a high degree of mixing between the air and hot gases before they enter the turbine

Definition EN: range between the lower and the upper flammability limit

Definition EN: chamber in which the power jet is affected by one or more control jets

Definition EN: the upper portion of the ingot,the solidification of which is retarded,so that it remains liquid and feeds the shrinkage cavity which occurs as the lower portion solidifies

Definition ES: parte de la faja, aguas abajo de la parte plana

Definition EN: the portion of the border below the level zone

Definition EN: region around launch pad which, before final countdown of large vehicle, is cleared of unnecessary personnel and objects

Definition EN: areas of excessive hardness caused by micro-structural segregations; a condition sometimes found in poor quality castings

Definition EN: a layer of a semiconductor detector in which no significant part of the energy lost by particles can contribute to the resulting signal

Definition EN: the zone of an armature,located midway between two consecutive poles,in which the flux is sensibly zero or,by extension,the zone of the commutator in which,when the machine is running at no-load,the voltage between two consecutive bars is sensibly zero

Definition EN: 'low population zone' means the area immediately surrounding the exclusion area which contains residents,the total number and density of which are such that there is a reasonable probability that appropriate protective measures could be taken in their behalf in the event of a serious accident

Definition EN: the zone of a combustion chamber into which fuel is injected and combustion initiated.Usually a recirculatory airflow pattern is created in order to provide continuous ignition of the incoming fuel/air mixture by contact with hot combustion products

Definition EN: any area to which access is controlled by the licensee for purposes of protecting individuals from exposure to radiation and radioactive materials

Definition EN: white iron structure more or less dispersed and sometimes rather large,usually detected during machining,finishing or surface treatment

Definition EN: a ring which has been shrunk on to a sectional hub or other split cylindrical piece

Definition EN: a wire or a band of a material with high tensile strength,encircling the rotor,generally placed on the end windings to restrain the windings against movement due to centrifugal action