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The propeller providing progress transport means due to rotation of driving wheel

their natural recovery in due course in course of self-arrangement of landscapes or their cultivation.

heightening of a level of primary products of waters due to increase of biogenic elements’ concentration in them.

the piston engine of external combustion in which working body is steam received in the boiler due to external combustion of fuel

an extreme form of ecological ignorance, encompassing in unawareness of due and compulsory in relationships with the environment.

The drum brake gear which unrotative part are pads braking effort is created due to pressing of pads to the internal surface of the reel