Английский язык. Никитина С.Я - 21 стр.

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21
to cool – to make smth cold when it has been hot or warm. (One way of cooling the
tea quickly is to place the cup in a bowl of cold water.)
to accumulate – to increase gradually in numbers or amount. (Over a period of years
the drug will accumulate in the body and damage the nervous system.)
to certify – to declare (to state) that something is true and correct. (The bank
certified my account.)
Ex. 15. Read the text and translate it using a dictionary if necessary.
JR
CENTRAL DEVELOPS NEW MAGLEV TEST VEHICLES
Specifications have been drawn up by JR Central for an improved maglev test train.
JR Central’s existing maglev train has already achieved a world speed record of 552 km/h.
(1) JR Central has drawn up specifications for new test vehicles to be introduced on
the Yamanashi maglev test line later this year. This is the latest step in developing
commercial high-speed maglev service in Japan. The main physical difference compared
with existing vehicles is a much-extended aerodynamic nose on the 28m-long lead vehicle.
(2) JR Central is constructing one new lead vehicle, one new intermediate vehicle
and two new bogies. Running tests will be conducted in combination with existing lead
and trailer vehicles. The existing lead vehicles have two different nose designs; lessons
learned from their aerodynamic performance have led to development of the extended
nose. The nose has been extended as much as possible for experimental purposes to
collect data on aerodynamic performance and motion characteristics. This will help to
determine the specifications for the nose shape of the final revenue service vehicle.
(3) The shape of the lower part of the intermediate vehicle has been changed from
the round to square one to match the shape of the bogie. The body structure has also been
revised and the cabin environment improved.
(4) The bogie itself has been simplified for easier maintenance and improved
reliability. Basically, the new vehicles are designed to develop the current test vehicles for
revenue operation.
(5) The current technical development plan, which includes vehicle testing up to the
year 2005, aims to reduce costs, particularly of the ground coil, the superconducting
magnets, and the guideway. At the heart of the maglev system there are onboard niobium
titanium superconducting coils cooled by liquid helium to minus 269
o
C. It’s a well-known
fact that at this temperature there is no electrical resistance.
(6) When electric current flows into the coils they become extremely powerful
magnets. The electromagnetic force between these magnets allows the vehicle to levitate
(to rise and float in the air) about 10cm.
(7) JR Central is promoting the development of superconducting maglev technology
in cooperation with Japan’s Railway Technical Research Institute (RTRI). Running tests
on the 42.8km Yamanashi test section, which is to become part of the 500km Chuo
Shinkansen maglev line linking Tokyo and Osaka, began in April 1997.
(8) Since then running tests have been done on more than 600 days, and trains have
accumulated about 176,000km. A five-car train achieved 552 km/h in manned operation

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