sentences:  In the earliest months of operation, due to unskilled staff, a large quantity of PVC was wasted because the machines turned out defected records, which were then trashed.Diskoton could manufacture only singles and EP records until the late 1975, when they acquired the equipment for manufacturing LP records as well as cassettes.Starting from 1980 Diskoton began occasionally using the service pressing of Jugoton pressing plant, while it became almost entirely dependent on the service pressing of PGP RTB pressing plant by the late 1980s.