نمایش نتیجه 1 تا 2 از 2 نتیجه یافت شده برای secondary control:
n: a system of blowout preventer controls, convenient to the driller, which can be used selectively to actuate valves at the master control panel. Also called secondary control panel. See also drillers BOP control panel.
n: The formation pressure control by well control technology,equipment and the fluid column pressure of drilling fluid.
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