... sending Roller can not run smoothly, please close it at once; and meanwhile, if there are odds and ends ... damaged. 3. If there is unusual voice, stop at once and check. Adjust the chain and screw if ... whether trhe knife blade is damaged, if so, repair it in time. 7. In case the material-sending machine ... should:firstly, check the Adjusting-and turing key; if it can not work effectively, place a new one in ...