Abstract: A sintered R—Fe—B permanent magnet has at least a grain boundary and composite main phase grains. The grain boundary has an RH-rich phase distributed in the form of an agglomerate within the grain boundary between the composite main phase grains, preferably at the intersection of any adjacent three or more composite main phase grains. The RH-rich phase is continuously distributed along the grain boundary in the form of a thin-layer stripe. The composite main phase grain has a core-shell structure, which includes a core structure having an R-T-B type phase structure and a shell structure on the outer layer of the core structure. The core structure contains Ce-rich main phase grains and Ce-poor main phase grains.

Abstract: The present invention provides a method and a system for preparing pulp for paper with grass straws as raw material. The method of the present invention includes the following steps: 1) adding water in raw material for pulping, performing a first enzymolysis with ligninolytic enzyme; 2) cooking the first enzymolysis product at 80-130° C.; 3) performing second enzymolysis with hemicellulase to the cooked product. The method of the present invention is able to improve the pulp yield, reduce discharge of pollutants from black liquor, lower alkali consumption and energy consumption, and facilitate extraction of lignin and C-5 sugars, and pulp has a high quality.

Abstract: The present invention relates to the technical field of plugs and sockets for electrical appliances. Disclosed are a surface contact plug and socket, comprising a matching plug and socket; a plug contact piece connected with a plug electric wire is arranged on the lower surface of the plug; and a socket contact piece connected with a socket electric wire is arranged on the upper surface of the socket; when the plug is inserted into the socket, the plug contact piece vertically or obliquely meets the socket contact piece to cause surface contact electrification. The surface contact plug and socket of the present invention employ surface contact between contact pieces, enlarge the contact area and improve current transmission capacity since the plug and socket are of the same size, and therefore the contact is always reliable, and the more the plug and the socket are used, the more reliable the contact is.

Abstract: A structural panel for insertion in a void of a double wall vessel. The panel includes a sectional sheet and a plurality of spaced dome-shaped projections extending perpendicularly from a local face from the sheet. The panel provides an interconnected interstitial space between layers that may serve as a drainable space for leak detection when used in vessels but also provides maximized structural rigidity in the length and width direction.

Abstract: The present invention relates to the technical field of plugs and sockets for electrical appliances. Disclosed are a surface contact plug and socket, comprising a matching plug and socket; a plug contact piece connected with a plug electric wire is arranged on the lower surface of the plug; and a socket contact piece connected with a socket electric wire is arranged on the upper surface of the socket; when the plug is inserted into the socket, the plug contact piece vertically or obliquely meets the socket contact piece to cause surface contact electrification. The surface contact plug and socket of the present invention employ surface contact between contact pieces, enlarge the contact area and improve current transmission capacity since the plug and socket are of the same size, and therefore the contact is always reliable, and the more the plug and the socket are used, the more reliable the contact is.