Abstract: Remodeling, designing and editing method and system for a printed wiring board which makes it possible to reduce steps for remodeling operation and improving a quality of remodeled d a according to effectiveness of manual editing is provided. The method and system comprises the steps for comparing connection pattern data of the previously provided printed wiring board with that of the latest circuit, displaying an editable section, which is different from that of the latest circuit, detected on the comparison, and inputting an instruction of disconnection or wiring to the editable section displayed on the displaying step.

Abstract: A heat-shrinkable cover sheet used for covering and protecting the peripheral surface of a joint of, for example, a steel pipe or cable is provided. The heat-shrinkable cover sheet has two branched tongue-like portions on each of both the ends in the direction of thermal shrinkage. A heating element formed of a heating electric conductor wire is included and built in the body portion of the cover sheet, the front tongue-like portion on one end of the cover sheet and the back tongue-like portion on the other end of the cover sheet, in a manner such that thermal shrinkage of the entire sheet is not prevented.

Abstract: Finely divided ethylene polymer particles having a smooth surface and regular spherical configuration are prepared by a method in which an ethylene polymer, an organic solvent for the polymer and water are charged into a vessel, the charge is stirred to mix the organic solvent, water and ethylene polymer, the charge is heated to a temperature at which the ethylene polymer is completely dissolved in the organic solvent, so as to form an organic solvent solution of the ethylene polymer mixed with water, the charge is cooled and, then, the mixture of organic solvent and water is evaporated away from the charge so as to allow the ethylene polymer to deposit in the form of finely divided particles from the charge.