Ohun elo pataki agbegbe ti irin alagbara, irin hun apapo, jẹ petrochemical ile ise, iru alagbara, irin hun mesh jẹ ga didara boṣewa ohun kan, ti o jẹ gidigidi lominu ni lati giveee aise ohun elo alloy akoonu, mesh micron išedede ati fifọ waya tabi meji waya imukuro.