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 * lem HX 20 NP
 * HY50P：http://www.alldatasheet.com/view.jsp?Searchword=HY50
   * http://www.alldatasheet.com/datasheet-pdf/pdf/81505/LEM/HY50-P.html
   * http://pdf1.alldatasheet.com/datasheet-pdf/view/81505/LEM/HY50-P.html