International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
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Term No.Term Name/Term DescriptionAction
165
J-Shaped distribution
An extremely asymmetrical frequency distribution with the maximum frequency distribution at the initial (or final) frequency group and declining (or increasing) frequency elsewhere......
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8480
J2EE (Java 2 Platform, Enterprise Edition)
Sun’s Java platform for multi-tier server-oriented enterprise applications. The basis of J2EE is Enterprise JavaBeans (EJB)......
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4382
Jack rings
Heavy steel castings or forgings used for supporting the casing in the hole before setting it, and for jacking the casing out of the hole when it is desired to withdraw it......
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3798
Jack-knife bridge
A bridge in which the lifting arms fold on themselves at midlength when in a raised position.
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5969
Jackhammer, or Sinker
An air-operated percussion-type drill that is small enough for being handled by a man.
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3719
Jamrao open type outlet, or Kirkpatrick open type outlet
A semi-module outlet, evolved by Kirkpatrick, the essential features of which include (i) 0.6 metres long converging approach at 1 in 4 on either side, (ii) narrow throat, (iii) expanding flume not less than 3.0 metres long with a splay of B/10 where B is in metre (illustrated)......
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3720
Jamrao type orifice module outlet, or Kirkpatrick orifice module outlet
A semi-module having a square orifice, an approach channel of 0.6 metre and an expanding flume with a number of baffles for recovery of head (illustrated)......
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8481
jar
Java archive is a compressed archive file containing Java class files, filename extension: “.jar”.
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4364
Jar
In well boring, a device consisting of two oblong flat links sliding freely within each other, for connecting a percussive drill to the rod or rope which works it, so that the drill can be given a sharp blow or jar on the upward stroke to loosen it when jammed in the rock......
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8482
Java
A simple, object-oriented, distributed, interpreted, robust, secure, architecture-neutral, portable, multithreaded, dynamic, buzzword-compliant, general-purpose programming language developed by Sun Microsystems in 1995(?). Java supports programming for the Internet in the form of platform-independent Java “applets”. .....
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6015
Jaw crusher
A primary crusher machine in when the motion is imparted to a movable jaw by means of a toggle joint that exerts the maximum force when the jaw is at the extreme of travel on its working stroke. These are of two types -Single toggle or Double toggle......
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8483
JDK
Java Development Kit, a free Sun Microsystems product which provides the environment required for programming in Java. The JDK is available for a variety of platforms, but most notably Sun Solaris and Microsoft Windows......
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2826
Jet
The stream of water issuing at high velocity from an orifice or nozzle or similar opening.
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5119
Jet cleaner
High-pressure water jet equipment with specially designed penetrating nozzles for removing blockages from drain pipes.
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2858
Jet deflector
A sector-shaped block with sloping arris which cut the high velocity jet emerging from an outlet for the purpose of flaring out the jet laterally into a fan-shaped sheet......
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2821
Jet diffusion
A method of energy dissipation used in the case of high velocity jets. It is accomplished by directing the water jets from an outlet sharply towards the bottom rather than over the tail water surface......
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2810
Jet diffusion basin, or Jet diffusion stilling basin
A stilling basin where the energy is dissipated by the jet diffusion principle to reduce the length of the basin normally required by the hydraulic jump (illustrated)......
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2952
Jet flow gate
A high pressure gate used as a regulating gate either at the discharge end of, or at any intermediate point in, a conduit. It consists of a gate leaf mounted on wheels and operated by means of a motor, gear reduction unit, and a pair of threaded stems or hydraulic cylinder hoist. A jet is created by the provision of a nozzle ahead of the gate such .....
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3279
Jet mixer
A device for dispersing the sediment into the sediment charge of canal water.
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5120
Jet pressure equipment
Jetting tool, hose and pipe used with a high pressure-jetting pump for cleaning or flushing drain pipes. Such a system may also be used for the installation of well points for dewatering......
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4501
Jet pump
A pump where a moving jet of water, steam, or air, delivered through a restricted throat at high velocity, creates a suction and draws in the water to be raised. The velocity energy imparted to such water is later converted into pressure energy by an expansion......
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2872
Jet trajectory
The profile of the free jet.
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4328
Jetting bit
A high pressure washing tip for jetting, usually combined with a chisel tip.
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4319
Jetting method of boring, or Hydraulic wash
A method of well boring in which the material encountered is loosened by a strong current of water directed through a suitable nozzle or bit and is carried to the surface and removed by the return stream of water......
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5121
Jetting pump
A high-pressure pump used in the flush cleaning of drain pipes, or in the installation of well points.
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