| 摘要 |
The spring is based on the elasticity of the gases in the pressurized element charged with nitrogen gas, constructed as a single piece, with a hollow rod and without a safety valve and basically by means of three machined steel pieces - body, piston rod and guide bush - with their accessory parts and seals for assembly and compact fitting of these three pieces together and a compression chamber is given a completely hermetic seal, having a stability during displacement of the piston rod, the assembly being pressure-mounted and made firm (signed) by a single steel safety ring. <IMAGE>
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