Salam sir... ap ki ik video js me ap develpor machine me daal rahe hn... unit ko khol kar... per hmare pas jo b tecnician ata wo tank unit k agy jo magnatic roler ha... paper pe devlpor dal kar usk oper girata r gear ko ghumata to dvlpr andar chala jata... wo method ziaada easy ni ha ya wo ghlat method ha?
