| 摘要 |
The frame, which surrounds the gas cylinder (2), is made in one piece with a base (11) which has a seat (11d) to provide a stable support for the cylinder, a ring-shaped top (12e) to protect the cylinder's neck, and side members (13) connecting the top ring and base. The base of the frame is also ring-shaped and has a curved concave inner generating surface to support the gas cylinder, the head can be made in upper and lower sections, and the side members can be straight or curved. |
