They have also worked out, according to the rou's actuallife, back up roll change regulation and compiled a data bank for back up roll service and maintenance.
又按照支承辊的实际使用寿命，制定了支承辊换辊制度，并编制了支承辊使用与维护管理数据库。
2
The actual show that the proposed all design scheme is practical, can improve a lot of car overall performance, prolong servicelife.