“罗克姆”汽车式液压起重机伸缩臂油缸的密封件,是采用夹织物橡胶密封环(一只压环、二只“V”形密封环和一只支承环)及两只树质固紧环组成(如图1所示)。这种密封环虽具有 The seals of the telescopic arm cylinder of the “Rockeem” auto hydraulic crane are made of a fabric rubber seal ring (a pressure ring, two “V” seal rings and a support ring) and two tree elements. The ring consists of (as shown in Figure 1). Although this seal ring has