Abstract: A plurality of multi-layer metal plates (1) each being composed of a bump forming metal layer (2), an etching stop layer (3), and a wiring film forming metal layer (4), and in which a wiring film (4a) is formed from the wiring film forming metal layer and a bump 2a is formed from the bump forming metal layer are prepared, and on a bump forming surface of a multi-layer metal plate, a wiring film of another multi-layer metal plate is overlapped. Such lamination process is repeated in succession for multi-layering. In addition, a polishing machine for multi-layer wiring board (11a) which includes metal plate holding means (13) for holding a metal plate (1a), cutter holding means (25) for holding a cutter (26) above the metal plate, height adjustment mechanism (20) for adjusting the height of the cutter holding means, and cutter parallel moving mechanism (15) for relatively moving the cutter holding means in parallel to the surface of the metal plate is used to conduct polishing.

Abstract: This invention relates to a bifidobacterium growth promotant comprising gluconic acid, a nontoxic salt thereof and/or glucono-.delta.-lactone as an active ingredient. The bifidobacterium growth promotant of this invention has selective bifidobacterial growth promoting-activity and, at the same time, inhibits growth of deleterious bacteria. Moreover, its rate of digestion and absorption in the upper alimentary tract is so low that the promotant has very satisfactory characteristics as a bifidus factor. Therefore, the bifidobacterium growth promotant of this invention can be used per se or as an additive for various foods and drink to provide functional foods and drinks, thus being of great value from the standpoint of health improvement.

Abstract: This invention relates to a bifidobacterium growth promotant comprising gluconic acid, a nontoxic salt thereof and/or glucono-.delta.-lactone as an active ingredient.The bifidobacterium growth promotant of this invention has selective bifidobacterial growth promoting-activity and, at the same time, inhibits growth of deleterious bacteria. Moreover, its rate of digestion and absorption in the upper alimentary tract is so low that the promotant has very satisfactory characteristics as a bifidus factor. Therefore, the bifidobacterium growth promotant of this invention can be used per se or as an additive for various foods and drink to provide functional foods and drinks, thus being of great value from the standpoint of health improvement.

Abstract: A speed change control device for a continuously variable transmission has a carrier adapted to rotate about a predetermined axis, a twin cone adapted to rotate integrally with the carrier while being held by the carrier and rotatable about a central axis which is inclined with respect to the predetermined axis, and a pair of track rings disposed around the outer periphery of the carrier and movable along the predetermined axis. A part of the inner peripheral surface of each track ring is in frictional engagement with the outer peripheral surface of the twin cone.