Abstract: According to the sampling method of the aspect of the present invention, the coordinate (location information) of the sampling location on the sampling specimen is generated randomly by the controller, such as a personal computer, of the sampling location display. Based on the location information, the sampling location is displayed on the sampling specimen, which is a part of the recycled raw material, by laser light. Because of this, arbitrariness, in which the operator artificially selects the sampling location, during incremental sampling for setting the average quality of the sampling specimen, such as the average content of valuable metal, can be excluded reliably.

Abstract: According to the sampling method of the aspect of the present invention, the coordinate (location information) of the sampling location on the sampling specimen is generated randomly by the controller, such as a personal computer, of the sampling location display. Based on the location information, the sampling location is displayed on the sampling specimen, which is a part of the recycled raw material, by laser light. Because of this, arbitrariness, in which the operator artificially selects the sampling location, during incremental sampling for setting the average quality of the sampling specimen, such as the average content of valuable metal, can be excluded reliably.

Abstract: A self-sustaining container made of a saturated polyester resin, formed by biaxial stretch blow molding and comprising a mouth and cervical portion, a shoulder, a body and a bottom, wherein said bottom has a self-sustaining structure with a plurality of legs radially bulged around the center of the bottom and valley lines formed between the adjacent legs, and the following portions (A) to (E) are low stretched portions and at least portions (B) and (C) among the following portions (A) to (E) are crystallized portions:(A) center of the bottom(B) peripheral portion of the center of the bottom(C) portion of each valley line close to the center of the bottom(D) portion of each leg from the edge of the peripheral portion of the center of the bottom to a ground contact portion(E) portion between said portions (C) and (D).

Abstract: A projection lens has a five-group structure, in which a first-group lens is a positive lens, a second-group lens is a negative lens, third- and fourth-group lenses are respectively positive lenses, and a fifth-group lens is a negative lens. The projection lens has a half view angle of 34.degree. or greater, and satisfies the following conditions: 0.04<d.sub.4 /f.sub.0 <0.08, 0.2<.phi..sub.1 <0.9, -0.6<.phi..sub.2 <0, 0.7<.phi..sub.3 <1.0, 0<.phi..sub.4 <0.5, and -1.36<.phi..sub.5 <-0.6, where: f.sub.0 : focal distance of the overall system, d.sub.4 : on-axis interval between the second-group lens and the third-group lens, .phi..sub.1 : power of the first-group lens, .phi..sub.2 : power of the second-group lens, .phi..sub.3 : power of the third-group lens, .phi..sub.4 : power of the fourth-group lens, and .phi..sub.5 : power of the fifth-group lens, (where .phi..sub.1 -.phi..sub.5 are respectively values obtained when the optical power of the overall system is set to 1).