Abstract: A plate-type heat exchanger that performs heat exchange between a first fluid and a second fluid and includes a main body plate stack including a plurality of main body plates stacked on one another, and a plurality of heat exchange flow paths defined between the stacked main body plates and configured to allow the first or second fluid to flow therethrough, an upper plate coupled to the main body plate stack in a first direction, and a lower plate coupled to the main body plate stack in a second direction opposite to the first direction. The main body plate may include a plurality of elongated protruding portions each having a shape protruding from a surface of the main body plate and extending in a direction at least partially coincident with a direction in which the first or second fluid flows in the heat exchange flow path.

Abstract: An exhaust gas treatment device including an outer housing including a first inflow part and a second inflow part, an inner housing provided in the outer housing and having a gas inflow part, a guide channel defined between the outer housing and the inner housing and configured to guide a part of the first exhaust gas to the gas inflow part, and a spiral member including a barrel part provided in the inner housing and configured to define a passage flow path, a spiral protrusion provided on an outer surface of the barrel part and configured to define a spiral flow path between the barrel part and the inner housing, and a gas discharge part provided in the barrel part and configured to discharge the first exhaust gas and the second exhaust gas, which have passed through the spiral flow path, to the passage flow path.

Abstract: Disclosed is a brake hose layout setting system that includes: a testing part provided to test the layout of the brake hose while brake hose fixing parts, which are manufactured using a 3D printer, are mounted; a scanning part provided to scan the layout of the brake hose and to obtain layout data during the layout test of the brake hose; and a controller for comparing the layout data of the brake hose obtained from the scanning part with surrounding part data to determine whether or not interference occurs and for correcting data on interfering parts to then provide the same to the 3D printer, wherein the testing part includes the brake hose fixing parts and first and second fitting members coupled to both ends of the brake hose, respectively, and wherein the first and second fitting members have the same structure. Various embodiments may be possible.

Abstract: In an embodiment, a method for interpreting a layout of a tube includes receiving three 3-axis coordinate values for a cross-section of a first and a second side end of the tube including a 3-axis coordinate value for a center point of the cross-section of the first and second side end of the tube; calculating a displacement and a rotation vector between the center points of the cross-sections of the first and second side ends of the tube, based on the received 3-axis coordinate values for the cross-sections of the first and second side ends of the tube; and calculating a distance and a rotation angle between the cross-sections of the first and second side ends of the tube, based on the calculated displacement and the calculated rotation vector.