) Pile foundation acoustic tube) The socket end is inserted into the socket end, and then special hydraulic pliers are used to squeeze the two convex grooves at the same time. The pipe shrinks and deforms after being stressed.
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) The outer pipe between the two convex grooves sinks deeply into the inner pipe, thus effectively realizing this The product is reliably connected and the rubber sealing ring deforms and fits between the two layers of pipes after being squeezed, which plays an extremely good double insurance sealing role.
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< ) Clamp-type