When the daily crowds finally dispersed, the No.4 Delaware men’s hockey team took over the rink, their smooth, purposeful strides leaving long grooves that covered the cuts in the ice made by all the regular patrons who had been there only minutes before. After a skate around, head coach Mike DeAngelis called his team together with three blasts of his whistle and, without a word, they assembled along the two blue lines to begin practice …