Abstract: A resin composition contains a preliminary reaction product (A) obtained by previously reacting a polyphenylene ether compound (a1) having a hydroxyl group in a molecule and an acid anhydride (a2) having an acid anhydride group in a molecule, and a curable resin (B) containing a reactive compound having an unsaturated double bond in a molecule, in which an equivalent ratio of the acid anhydride group in the acid anhydride (a2) to the hydroxyl group in the polyphenylene ether compound (a1) is 1.5 or less, and a content of the curable resin (B) is 20 to 85 parts by mass with respect to 100 parts by mass of a sum of the preliminary reaction product (A) and the curable resin (B).

Abstract: In the structure of a stave for cooling carbon fire-bricks laid on a hearth side wall of a blast furnace, the stave arranged between the carbon fire-bricks on the hearth side wall and a shell is made of a rolled steel plate. The stave body is formed in such a manner that a cooling water passage is formed by drilling the steel plate directly, or the steel plate on which grooves are formed is joined onto another steel plate to be used as a cover. A cooling water feed port and a cooling water discharge port are provided on the outside of the stave body, and these ports are connected to the cooling water passage.

Abstract: An apparatus for the adjustment of optical axis in a TV camera, in which a supporting member for integrally supporting an optical lens and a supporting member for integrally supporting an optical system are assembled so that they are fastened in the direction of the optical axis by clamping device, and in the state where the clamping device is loosened, both of the supporting members are relatively moved in a first direction orthogonal to the optical axis by first positioning device and both of the supporting members are relatively moved in a second direction orthogonal to the first direction by second positioning device. By this adjustment apparatus, the adjustment is carried out so that the optical axis of the optical lens is in agreement with the optical axis of the optical system.