Abstract: A dimension measurement apparatus is disclosed, including a carrier plate and a line scan camera. The carrier plate is configured to carry a to-be-measured item. The line scan camera is disposed opposite to the carrier plate along a first direction and configured to photograph the to-be-measured item. The line scan camera is configured to be movable relative to the carrier plate along a second direction, and the first direction is perpendicular to the second direction. The dimension measurement apparatus can improve the shooting efficiency.

Abstract: Provided is a method for producing mercury-free alkaline-manganese type electrolyzed manganese dioxide, which sequentially comprises: (1) mixing manganese oxide ore and pyrite, continuously feeding the mixture and sulfuric acid into a continuous leaching tank to form a one-stage or multi-stage continuous leaching, removing potassium ions first after leaching, and then removing iron by means of a neutral iron removal method, and adding lime powder at the late stage of iron removal to adjust the pH value of the solution to 6-6.5, so as to obtain a manganese sulfate solution after reaction at 90-95° C.

Abstract: Polyol-bioceramic composites are prepared by the reaction of a polyol and polycarboxylic acid in the presence of a bioceramic. Implantable medical devices fabricated at least in part with the crosslinked polyol-bioceramic composite materials are useful in a wide variety of applications.