Connection modifying method for work system arm support-grate, involves leaning grate to arm by scr

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The method involves providing a grate together with an arm in a work system, where the arm is composed of an extirpator and adopts a curvilinear form of trapezial prism in a terminal portion. The terminal portion is bevelled in an internal superior part that allows sliding of a pin. The grate is leaned to the arm by screws, which allows forces of cohesion of a metal to resist efforts in cleaved function of Earth.