The invention relates to a method for computer-aided segmentation of an environment into individual objects, in particular of a wood into individual trees, in which signals backscattered by the objects are recorded by measurement technology, wherein the backscattered signals result from the irradiation of the environment to be segmented with electromagnetic radiation. A first tank of the plurality of tanks is placed on a portion on the right or left side of the upper frame, and a second tank is arranged on a portion between the cabin and the engine room on the opposite side to the first tank. Successive composite images, along a given flight path, are then mosaiced together to form a strip. Circuit is between IO pad and ground and is powered by the same VDD. A method and system of reconstructing a bill of materials for one assembly as well as of reconstructing a comprehensive bill of materials for multiple assemblies is also disclosed. An impurity storage section 30 that communicates with an outlet of an anode gas passage of each cell 20 and stores an impurity in a fuel gas is formed in a fuel cell stack 2.