Made in chongqing yuneng, explosion-proof oil-purifier had passed country-examination and have maintained the license and their types include: zja series double-stage high-vacuum oil-purifier, zjb series high-efficient vacuum oil-purifier, zjc-t series special vacuum oil-purifier for turbine oil, zjc-r series lubricating oil vacuum oil-purifier, kyj series oil-purifier for fire-resistant oil and improved explosion-proof oil-purifier according to the requirement of customers. please indicate the degree of explosion-proof in the application cond.