A method of fabricating a semiconductor device, comprising: forming a plurality of memory cell strings; coupling an interconnection to at least two of the memory cell strings; and coupling a bitline to the interconnection. The vehicle noise-proof cover is placed so as to cover a driving force generating device of a vehicle. The second support is movable relative to the first support in a cross direction. The biasing member is disposed in the strap-operating space to provide a biasing force for urging the strap holder to the strap-retaining position. The system comprising a test pattern generator and a mixer for combining an output of the test pattern generator with an output of the optical reader.