A method for testing the mechanical properties of rock true three-dimensional test system, comprising: a test chamber, which is filled with liquid in a closed chamber; a loading device provided in the test chamber, the loading device for the folder Soil samples of applied load support; dynamometer, .....
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The present invention relates to a shape memory fiber and its preparation method, the shape memory fibers are made from a shape memory polyurethane, said polyurethane formed by the reversible phase component (A) to form a fixed phase component (B) prepared by . The shape memory fiber preparation met.....
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The utility model relates to an electronic device for detecting atherosclerosis. The device includes an ECG sensor for collecting ECG signals, an ECG amplifier connected with the ECG sensor for amplifying the ECG signals collected by the ECG amplifier, a voltage comparator connected with the ECG amp.....
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The present invention relates to a preparation of shape memory polyurethane shape memory fiber and its preparation method, the shape memory polyurethane is a hydroxyl group-containing organic polymer material, a chain extender, a diisocyanate, blocking agent, the molar ratio of 1: 1-3:2.4-4.8:0.8-1......
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The invention provides a fluid buffer with adjustable damping coefficient, it includes: cylinder tank which has a placing space, the placing space is filled with fluid; piston which is equipped with piston head moving in the placing space and the piston bar extending from the piston head to two ends.....
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