Hydraulic valve block balance weight piston sleeve has thin wall, high precision of geometry dimension and strict roughness, and its quality determines the lifetime of balance weight directly.
缸块平衡块的活塞套壁薄，几何尺寸精度要求高，粗糙度要求严格，其质量好坏直接决定平衡块的寿命。
It is an important aspect to avoid the deformation of the sleeve type parts with thin wall and keep their held accuracy as the clamp chuck was designed.
薄壁套类零件的装夹变形和夹持精度，是夹具设计时需重点关注的问题。
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