青云翻译

When the seal frictional contact with the flange, for some time, will produce very fine

When the friction contact SEAL with flanged, for a period of time will produce detritus

When SEAL and the flange carry on the rubbing contact, after period of time, can produce the powder dust

When SEAL contacts with flange for friction, and after a period of time, and will produce better pieces

When the friction contact SEAL with flanged, for a period of time will produce detritus