| 摘要 |
FIELD: sealings. ^ SUBSTANCE: bushing made of a wear proof material and provided with one or more longitudinal V-shaped slots is set on the rod of a rod pump. The bushing is housed in the flexible bandage made of a compressed loose material, e.g. rubber crumb. The wall of the housing is provided with a pressure pickup. ^ EFFECT: enhanced reliability. ^ 1 cl, 2 dwg
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