casing spool
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SPOOL, CASING HEAD: CASING HEAD; 13-3M
套管四通。套管头13-3M
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Then the responding and flow disturbing characteristics of the valve are studied by means of both linearized analysis and numerical simulation. At last the performances are compared with the conventional ones and the influences of the clearance between spool and valve casing are also discussed.
第二章提出了利用阀芯的双运动自由度及毛细阻尼管沿程压力特性设计流体控制元件的基本思想，并叙述了按该思想设计的流体换向阀、流量控制阀及压力阀的工作原理和性能特点。
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casing spool：套管防喷法兰短节;大绳滚筒
套管裂纹 casing split | 套管防喷法兰短节;大绳滚筒 casing spool | 套管爆炸装置 casing squib
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casing spool：套管防喷法兰短节
Christmas tree 采油树 | casing spool 套管防喷法兰短节 | casinghead 套管头
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casing spool：套管四通
DRILL SPOOL 钻井四通 | CASING SPOOL 套管四通 | TUBING SPOOL 油管四通
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casing spool：套管放喷法兰短节
Pile hammer 打桩机 | Casing spool 套管放喷法兰短节 | Back-off procedure 倒开(螺纹)步骤
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casing connecting spool：双法兰短节
套管气收集系统 casing collection system | 双法兰短节 casing connecting spool | 套管连接 casing connection
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