dummy cylinder
平衡缸套
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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。
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.
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