Б) cut cotter cutting

1....s are designed for cutting coal and other minerals,
including rock salt, potash, tuff, limestone, etc.

2. The... mechanism of a coal-cutter may be a disk or a chain.

3. The cutter can... minerals of varying thickness.

Unit 9

31. Подберите из списков А и Б близкие по значению слова:

А. Б.

1. lorry a) spoil heap

2. slope б) user

3. waste heap в) excavator

4. consumer r) truck

5. dumping д) restrict

6. earth-mover e) excavator

7. surface mining ж) tip

8. limit з) open-cast mining (strip mining)

9. power shovel и) roof timbering
10. roof support к) face

32. Определите, какой частью речи являются выделенные слова. Пере­
ведите предложения:,

1. There exist various types of electric drills which are in use
in rocks of different hardness.

2. To increase drilling speed, modern drill bits (коронка) are
covered with hard allpy (сплав).

3. Using electric rotative drills it is possible to drill holes into
coal and soft rock such as soft shales.

4. The Donbas cutter-loader wins and loads coal of low-to-
medium hardness and anthracites in gently sloping seams under a
roof of average strength.

5. Scraper conveyers can convey great loads per hour.

6. As a measure of safety the shields protect face personnel and
equipment from falling rock.

7. For the measurement of the pressure and speed of air there
are special barometers which measure the absolute pressure of air.

8. The drills for making holes have handles.

9. It is rather difficult to handle the equipment underground.

33. Заполните пропуски в предложениях, используя следующие предлоги: