Cyclophos phamide by the current-limiting resistor R6 and voltage regulator tube VZ components, the UB voltage for the unijunction transistor VU DC power supply.
The failure of directly buried heat-supply pipeline is discussed, and the design essentials are put forward in accordance with local buckling and ovalization deformation.
An equalarea pseudo cylindrical projection gather is constructed, in which the longitudes are hyperbola being symmetrical to the central meridian and the latitudes are parallel lines.