... dirt,weak aicd,alcohol,etcMetals potteryJoil,slop,weak acid,acid etc,mediumHard alloyDgoil,dirt,weak acid and alkali,hydrocarbon,alcohol,etcAcid alkaliT≤200Tungeten ... ,organic solvent,ethylic acid,ethylic fat,etcTeflonFtVarious medium with causticityT≤120Tin bronzeTeOil,salt,alcohol,fatty acid,seaweater,etcAwlGtVitriolAbrasive casting awlNtAlcohol,oil,fatty acid,etc(mechaincal seal ...