Onigun mẹrin yii (alapin) apo idalẹnu isalẹ ti n ṣe ẹrọ, mimuuṣiṣẹpọ pẹlu eto iṣakoso ẹdọfu, ti o ni atunṣe adaṣe PLC, ṣiṣiṣẹ ati iṣakoso labẹ ọpọlọpọ ọgbọn ati eto ayẹwo aṣiṣe, eyiti o jẹ ohun elo pipe fun iṣelọpọ apo idalẹnu square square, nipasẹ awọn sobusitireti bii bii ṣiṣu / ṣiṣu, iwe / ṣiṣu, iwe / iwe laminated ohun elo