Original sentence: - 20 BTR-50PU-II.250 BTR-50PK and BTR-50PU and 500 OT-62 TOPAS.Used BTR-50PK but withdrew them from service, only 70 BTR-50PUM1 and BTR-50YVI left
Edited sentence: - 20 BTR-50PU-IIs.250 BTR-50PKs and BTR-50PUs and 500 OT-62 TOPASes.70 BTR-50PUM1s and BTR-50YVIs are currently in service.Used BTR-50PK but withdrew them from service