单井集气Single well gas collecting 除采气树外，井场还有（）装置。处理后气体经集气管网送到总站进一步调压、处理、计量后外输。 In addition to the gas tree, there are throttling, pressure regulation, separation, metering devices. After treatment, the gas is sent to the main station via the collecting pipe network for further pressure adjustment, treatment and measurement.
A、节流
B、调压
C、分离
D、计量