Abstract: In a crawler type work machine, when switching from a pivot turning mode to a straight travel mode or a slow turning mode, a controller is configured to maintain a rotation speed of the turning motor until after a first timing at which the inside steering clutch begins partial engagement.

Abstract: A multi-slot call relocation control method and system having a multi-slot call switching system and/or transmission equipment constituted by an address control memory, address controller and address location changing circuit whereby address write and read information for a channel memory is controlled. Where unoccupied circuits are 2.sup.N (N: natural number) times the basic switching unit, incoming calls with a maximum of 2.sup.N basic switching units in capacity may not be switched or transmitted by the unoccupied circuits depending on their status involving the presence of other calls. In that case, calls are relocated within a frame using the fewest steps possible. This is achieved by a neural network in the address control memory of multi-slot call switching system A, the neural network learning to output a call allocation pattern such that the number of times calls are relocated becomes minimal.