Запишите предложения. Выпишите из них сказуемые,
определите их видо-временные формы и залог. Переведите.
1. Experts in mine construction technologies have been shown
some types of new building materials.
2. In Australia and South Africa open cast mining is used for
both thermal and metallurgical coals.
3. The results of calculation are influenced by the calculation
method.
4. The operator had to replace only one part in that device.