... -mixed, degumming, dehydration, deacidification, decolorzation, dewaxing and deodorization.oil refining machine Main Equipment :Decoloration tower, ... of welding seam,avoid cracking and has a long life for about 8 years.2. professional ... ,no smellyc.Longer life : Using Q345R special steel plate ,welding seam with auto welding ... saving:1. well sealing for heating system ,no gas leak and saving fuel.2. the ...