| 摘要 |
The cylinder has a pressure resistant envelope structure (1) covered with an outer protection layer. The layer has, at the vicinity of two ends of the structure (1), two housings for receiving a threaded insert and a boss of end flanges (9) of an apron (7) and a handling structure (8) such that a roller (15) of the apron and a transversal handle (13) of the structure (8) are parallel to each other. |
