. some pencils were originally wrapped in string or twine, but later pencil cores were encased in hollowed out wood. sampson mordan was the first inventor to patent a version of the mechanical pencil with his patent gb of . this was a patent for a refillable mechanical pencil and mordan's company s.mordan...
man-made fibres manufacture of basic pharmaceutical products and pharmaceutical preparations - manufacture of basic pharmaceutical products -- manufacture of basic pharmaceutical products - manufacture of pharmaceutical preparations -- manufacture of pharmaceutical preparations manufacture of rubber and plastic...