the annular BOP
1.The features of spherical packing unit annular BOP 2.The spherical packing units are exchangeable with the SHAFFER's
The features of spherical packing unit annular BOP>>The spherical packing units are exchangeable with the SHAFFER's>>The added wear-belts to the original design can prevent and improve the cylinder-grinding because of unbalanced loading.
the annular BOP