Sanding machine for rotating joint use of reliable spherical seal friction seal structure, its structure is simple and can self-aligning, automatic compensation; connection thread internal standard M36 × 4, on the imported equipment is also equipped with a 37.6 × 12 teeth / inch, and a special siphon hose, matching, replacement is very convenient. European and American markets for the standards, maintain high-end equipment developments, we introduce the Japanese seals and technologies to achieve a leading position, replace the rotary joint European and American imports, foreign companies and joint ventures for the maintenance of the equipment provides a convenient, large domestic companies rely on imported parts to solve the troubles. Used for chemical mechanical (general type of the product shelf life of 180 days, high shelf life of 365 days).