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                帶壓換 冷然一笑閥設備

                主頁 > 設備制造 > 帶壓換閥設備 >
                摘要:換閥器是根據井下封隔器的原理采用液壓控 一驚制技術,卡瓦和膠筒在油管內和油管頭四通側通孔的內壁進行密封和鎖定,卸掉壓力,更換井口
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