A method of producing a polydeoxyribonucleotide molecule by reverse transcriptase polymerase chain reaction wherein the polydeoxyribonucleotide molecule has a length of greater than 5,000 base-pairs is disclosed. The shielding casing has a functional lid, which is manufactured in the top of the one-piece manufactured shielding casing so the lid is a functional part of the one-piece manufactured shielding casing. The interface system also provides a version-dependent interface to the computer resource that is typically not exposed. A metal panel has a contact finger that electrically contacts a ground point to provide protection against EMI interference. 3 to 1 percent by mass and a synthetic oil composed of carbon and hydrogen and having a number average molecular weight of from 2,000 to 20,000, in respective specific amounts and an extreme pressure additive of from 0. In the present invention, in order to accomplish the above-described object, there are provided a method and a device for determining the position for detection of charged particles by making the comparison between a stained optical microscope image and an elemental mapping image formed based on X-rays detected by irradiation with the charged-particle beam.