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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本書為《澳門人文社會科學研究文選》系列書籍之一,由單文經、林發欽主編,全卷共收錄37篇文章。文中透過價值與指標、回顧與展望,比較與借鑒等不同方面研究澳門的教育。作者/Author: 單文經、林發欽主編出版社/Publisher: 澳門基金會、社會科學文獻出版社合作出版
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The invention discloses a 2D dynamic calibrating table, for calibrating a GPS system arranged on a construction, comprising: a bearing frame, a moving platform, a double-layer two-way movement mechanism arranged between the bearing frame and moving platform to drive the moving platform to make 2D mo.....
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阻止互联网几乎是不可能的。不是要消除世界上的病毒,而是要在人们心里培育能够战胜病毒的力量!作者/Author: 朴玉洙出版社/Publisher: GOOD NEWS HONG KONG CHURCH LIMITED
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本发明涉及一种磨削辅助电化学放电加工工具及加工方法,该方法尤其适用于金属基复合材料的加工。所述磨削辅助电化学放电加工工具包括ECDM电极以及设于所述ECDM电极上的磨料层,所述磨料层主要用于移除加工过程中火花坑周围形成的重铸材料。实施本发明在对难以加工的材料进行加工时能够增加材料的去除率,获得更好的表面质量,并且大大地延长了加工工具的寿命。
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