| 摘要 |
<p>A hollow cylindrical plunger (4) has an open proximal end slidably fitted in a hollow cylindrical casing (1). A piston (7) in the casing (1) has a head (11) slidably fitted in the plunger (4) and carried by the free end of a rod (8) having its other end fixed to the casing (1). The hollow plunger (4) itself constitutes part of the hydraulic fluid reservoir. <IMAGE></p> |
