(57) Abstract Be able to use for the track/truck which is named cab over, be able to use not to relate to the medium-sized track/truck or the track/truck, various the type which differs to be able assemble on the assembly line of the conventional type automobile, although it possesses the cabin form which is conventionalized, it was as follows constituted modular structure of the cabin which is improved, namely, it forms the floor which forms the space of the engine which is loaded under the floor respective left which possesses appropriate irregular form and to possess two side framework bodies which consist of right door framework body, the floor to be connected by the rear panel of the cabin, the left and right door framework body and the rear panel to be connected by the upper framework body and the floor, the floorBeing irregular form, extending from the rear panel, just necessary tilt angle of skew being bent on there reaching up to the front part of the cabin, it is connected by the front panel, as for the said panel through the pillar of left and right two, being connected by the upper framework material, in order for the framework where you can install the windshield to be formed, it is constituted.
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