A package accommodates an LD device for emitting laser light with the center wavelength of which is in a range of 1300 to 1440 nm and airtight seals a light path extending from the LD device to an incident end of an optical fiber. The present invention accomplishes the identification by searching for suspect circuits and then modifying these circuits to represent a device known by an EDA tool. The treatment element is substantially axially fixed in relation to the receiving sleeve when said sleeve moves between its receiving and interposed positions. Another embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material that contains at least the following components -, forms a cured product with a theoretical molecular weight between crosslinking points in the range of 250-350 gmol, and has an initial viscosity at 80 C. The emulsion according to the invention produces an aesthetically pleasing product, capable of removing non-water proof make-up and able to deliver salicylic acid to the skin and is mild on the skin. As a result, static charging of the unit, which could become dangerous, is precluded.