| 摘要 |
1. The hydrant base lid has a projection with external thread and a cylindrical socket, located on the face of the lid. Unique characteristics: The external surface of the lid (1) has the shape of a truncated cone. The revolving flange (10) is mounted at the end of the lid. The socket (2) and the lid (1) accommodate the off-centre stud (3). The lid (1) contains the opening (5), which ends with the seal (7), secured in the recess (6).
|
