A plurality of command storage areas respectively corresponding to a plurality of priorities and storing IO commands in a storage control apparatus are common to a plurality of ports and a plurality of processors. The roller body includes a plurality of grooves. 1-10 percent by weight triacylglycerides, 30-95 percent by weight monoacylglycerides and diacylglycerides combined, and 0. A second frame member extends between a bearing support adjacent the left wheel of the second wheelset and a bearing support adjacent the right wheel of the first wheelset. Auxiliary accommodation spaces for accommodating the auxiliary electronic components are formed between the partition wall and the rear wall. Thus, the deformation of the gas diffusion layer due to a fastening pressure can be suppressed to improve the power generation performance.