1.Manufacture
Our production and inspection strictly act according to machining work ,we make sure of the famous machines and equipments to control our quality .That's only one of the ways to keep the goods quality ,we also using the raw-materials ,which imported from Europe and Korea to produce our products ,so our quality keep the step with European.

2.Inspection
It's the basic of control the quality that strictly inspection ,our products from choose the raw-material to enter the finished products into warehouse each taches are pass over different departments inspecting and testing ,so that the quality have well guaranteed.

3.Services
Technical Services - Department of research and development is orientated to support services concerning Donsen product applications.
Our help to schools - within the framework of our cooperation with building equipment beadhouse and engineering schools we grant

them various discounts on material used for training purposes, hold special training courses, and field trips. We also help in collection of necessary information.
Our cooperation with Society for Environmental Technology - within the framework of this cooperation we sponsor various seminars for designers of sanitary and industrial installations and participate in their further professional education.