document.write('<li><a  href=./html/2007-6-7/200767155505.htm target=_blank>References list of Electromagnets for Sheet Coil  </a><br><li><a  href=./html/2007-5-15/2007515164201.htm target=_blank>ELECTROMAGNETIC LIFTING SYSTEM FIELD OF THE INVENTION </a><br><li><a  href=./html/2007-5-15/2007515162540.htm target=_blank>Lifting and dropping objects </a><br><li><a  href=./html/2007-5-10/2007510165829.htm target=_blank>What types of magnets are there? </a><br><li><a  href=./html/2007-5-10/2007510164429.htm target=_blank>What is an electromagnet? </a><br><li><a  href=./html/2007-5-10/2007510163619.htm target=_blank>Bar Magnet and Solenoid </a><br><li><a  href=./html/2007-5-10/2007510163154.htm target=_blank>Electric and Magnetic Sources </a><br><li><a  href=./html/2007-5-10/2007510162950.htm target=_blank>Bar Magnet </a><br><li><a  href=./html/2007-5-10/2007510161417.htm target=_blank>How do I make an electromagnet? </a><br><li><a  href=./html/2007-5-10/2007510161201.htm target=_blank>Electromagnets </a><br><li><a  href=./html/2007-5-10/2007510155708.htm target=_blank>How Electromagnets Work-The Coil </a><br><li><a  href=./html/2007-5-10/2007510154615.htm target=_blank>Magnetic Field </a><br>')