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[email protected] в категроии Английский язык, вопрос открыт 25.09.2018 в 19:49

Power stations are equipped with ...machines.

A.M. Terpigorev's investigations in mine safety were a success. He worked out a series of safety measures in gassy collieries. His ... research greatly improved the working conditions in mines.

The extensive use of scientific and technological achievements makes it possible to develop all branches of production. The scientists are working out new methods of mining... minerals.

Fire damp does much harm to the health of miners. It is the most ... of all the gases in the mine air.