... : The RAM blowout preventers(BOP) is an integral part of well control equipment, featuring flexible closings and openings, easy operation, safe ... hydraulic dual-RAM BOP, hydraulic single-RAM BOP, manual dual-RAM BOP, manual single-RAM BOP, etc.Structural Features: (1) ... and strengthen requirements; 8. Locking type: Hydraulic locking or manual locking; 9. Fitted rams: Pipe RAM and shear RAM ...