An electric and also hand hydraulic pressure regulating mechanism is designed for the electric-hydraulic control device for hydraulic BOPs.

• 为液压防喷器电-液控制装置的研制设计了一套电动加手液动远、近程调压机构；司钻控制箱采用了防爆设计；整个装置的交直流电源可自动切换。