Abstract: An exhaust gas filter comprises an outer tube, a plurality of center-closing filter units each having an isolation plate; and a plurality of center-opening filter units having an annular isolation plate, two kinds of filter units being arranged alternately in the outer tube. The isolation plate and annular isolation plate are enclosed by flammable fibers. When a contaminated gas goes through the flammable fibers, it can be filtrated.

Abstract: An exhaust gas filter comprises an outer tube, a plurality of center-closing filter units each having an isolation plate; and a plurality of center-opening filter units having an annular isolation plate, two kinds of filter units being arranged alternately in the outer tube. The isolation plate and annular isolation plate are enclosed by flammable fibers. When a contaminated gas goes through the flammable fibers, it can be filtrated.

Abstract: An apparatus for manufacturing a glass frame, comprises a mold having a rectangular frame-shaped storage recess in which both end portions of a plurality of strip-like glass plates and are stored such that they are overlapped, coil heaters which simultaneously heat and melt the end portions of the plurality of strip-like glass plates and stored in the storage recess of the mold, and a pressing unit which simultaneously presses the end portions of the plurality of strip-like glass plates and molten by the coil heaters such that the resultant has a thickness equal to that of the strip-like glass plates.

Abstract: A needle-like monoammine complex of zinc carbonate containing or not containing aluminum useful as a filler or a precursor of needle-like electroconductive zinc oxide, and a process for producing it which comprises steps of dissolving a zinc compound in a solution containing ammonium ion and carbonate ion in the presence or absence of aluminum compound and then lowering pH of the solution to precipitate zinc carbonate.