... : MARKER PEN : 1. the maker pen,as we term it, uses its body structure hold the ink, and with an automatic ... can be replaced. Itcan be re-used all the time for 100% effective use, so the comprehensivecost is low.4 colored ... requirment.what is more, there have a variety of USES , for pen,for chalk,for present, use on company, on school,on catering and ...