1) tunnel whole-space
井下全空间
5) hall space
"厅井"空间
6) subsurface safety valve
井下安全阀
1.
This paper briefly introduces the principle of work of subsurface safety valve,analyses present technical situation and production of domestic and foreign in the last few years and concludes development current of subsurface safety valve that develop the system of subsurface safety valve for reliable,simple structure and Intellectualization performance from now on.
介绍了井下安全阀的工作原理,对国内外的研究现状及成果进行分析,总结出井下安全阀今后的发展趋势,必须是发展性能可靠、结构简单、智能化的井下安全阀系统,并提出了几点建议。
补充资料：全空间
全空间
total space
全空间【tot习邪ee;pace加eHH，npocTpaHcTBO} 见纤维空间(fibre space)·
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条