| 摘要 |
<p>A piston (58) for a cartridge (12) of the type having the piston (58) provided at a proximal end (16) and an aperture at a distal end that opens into an interior of the cartridge (12) holding fluid contents under pressure applied at the piston (58), the piston comprising: a decompressing means (56) arranged, when pressure is not applied to the piston (58) in use, to release fluid pressure in the cartridge (12) to inhibit at least a portion of the fluid contents from being released through the aperture.</p> |
