| 摘要 |
A gas cylinder lifting device is disclosed for height adjustment including all plastic housing (92), a plunger assembly (90, 91) incorporating a plunger (91) with a head or piston (103) which assembly (90, 91) is slidably movable inside a cylinder bore, the piston (103) disposed between opposite fluid chambers (100, 101), metering valve (99) within the piston (103), cylinder charging and discharging valve (97), and extendable and retractable actuating rod (98) for selection of various positions for the plunger assembly (90, 91). |
