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H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/30—Devices which can set up and transmit only one digit at a time
H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
H04M1/315—Clutches; Spring assemblies; Speed regulators, e.g. centrifugal brakes
Evaluation of the integral scales of velocity and temperature pulsations in the atmospheric boundary layer(Velocity and temperature pulsations as function of stratification parameter in atmospheric boundary layer)