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-Rod made of stainless steel manufacturing
It requires some practical ability
But dual V-slot clutch is much more stable than the single V Slot clutch
The surface is treated with electroplating technology
Teching 219pcs 3D Metal Pumping Unit Model DIY Assembly Model Science Education Toy Gift Type_ENJOMOR® Brand -Rod made of stainless steelTeching 219pcs 3D Metal Pumping Unit Model DIY Assembly Model Science Education Toy Gift Note: gald to tell you that we have upgraded this pumping unit. we will send the new version (orange color) from now on. the new version is available now. click. Features: . Pumping Unit Model: A pumpjack is the overground drive for a reciprocating piston pump in an oil well. It is used to mechanically lift liquid out of the well if there is not enough bottom hole
