单项选择题
(A)干线首站输往天然气处理厂; (B)干线首站输往城镇居民或厂矿; (C)天然气处理厂或干线首站输往城镇配气站或工矿企业一级输气站; (D)一级输气站输往城镇居民或厂矿
(A)气井→集气站→城镇配气站; (B)气井→天然气处理厂→城镇配气站; (C)集气站→天然气处理厂→城镇配气站; (D)集气站→天然气处理厂→输气干线首站
(A)气井→集气站→脱硫厂→输气首站→输气干线; (B)气井→集气站→增压站→脱硫厂→干线首站→输气干线; (C)气井→增压站→干线首站→输气干线; (D)气井→集气站→脱硫厂→干线首站→输气干线
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