| 摘要 |
The chest has a fixed outer carcass and an inner mobile compartment. This slides on a double frame (4,5) below or above it. The fixed frame (4) is T-shaped and has a bar (6), parallel to the compartment's movement, and a cross bar (7), perpendicular to this. At each end of the cross bar there is a roller (8). The mobile frame (5) is quadrilateral and has two bars (9,10) parallel to the compartment's movement, and two cross-bars (11,12). Two parallel bars (13,14) between the cross-bars hold a roller (15); the bars of both frames being shaped to guide the rollers. |
