... P type','BES',etc.,the seal is sefe and reliable,and the operation is simple, tubing hanger adopts ... adopts an integral type structure, reduces leakage points,and increases safety,the tubing hanger of the submersible ... provided with a cable crosser hole and a capillary cable hole,and the underground safety valve controls the ... class:PR1~2 API 6A oil and gas drilling equipment eucalyptus trees X-mas Tree