1)  net positive suction head available
可用的净正吸上压头
2)  NPSHA
可用的净正吸上压头
3)  Availability
可用
4)  high availability
高可用性
1.
Study on High Availability BOP Control Network in the Power Plant;
发电厂高可用性BOP控制网络设计要点探讨
2.
An Sample of Database High Availability on HP-UX;
基于HP-UX平台的数据库高可用性设计
3.
Application of virtual mechanism in high availability system based on autonomic computing;
虚拟化技术在基于自律计算的高可用性系统中的应用
5)  effectiveness
可用度
1.
On the basis of analysis of the reliability of coal bin, the model on the reliability of extraction and conveyance system is established in the high output and high efficiency mines which have one face or two faces, and the calculating formulas of effectiveness and relative rate of utility of the system are also given.
在煤仓可靠性分析的基础上 ,建立了“一矿一面”和“一矿二面”高产高效矿井采运系统可靠性模型 ,得到了系统可用度和相对利用率的计算公式 。
2.
On the basis of analysis of the structure of fully mechanized face system, the mathematic model for studying the reliability of the man machine environment system of fully mechanized face is established with the application of systematic reliability, ergonomics and grey system theory, and the calculating formulas of the effectiveness of the system are also given.
在综采工作面系统结构分析的基础上，综合应用系统可靠性、工效学和灰色系统理论，建立了综采工作面人－机－环境系统可靠性分析的数学模型，得出了系统可用度的计算公式，并对平顶山一矿２２０８１工作面进行了可靠性计算和分
3.
Based on the application of systematic reliability and grey system theory and fuzzy mathematics method, the reliability of the man machine environment system of caving fully mechanized face is studied, and the calculating formulas of the effectiveness of extraction system and caving system are also give
综合应用系统可靠性、灰色系统理论和模糊数学方法，研究了放顶煤综采工作面人－机－环境系统可靠性，得到了割煤系统和放煤系统可用度的计算公
6)  usable fluid volume
可用液量
1.
Analyzing usable fluid volume and proposal of accumulator bottles;
储能瓶可用液量分析与使用建议
参考词条
补充资料：可用的净正吸上压头
分子式：
CAS号：

性质：指泵从泵装置系统获得的可用(实际起作用)的NPSH：。NPSHA的数值可以根据泵的NPSHR确定；也可根据被送液的温度-流量等，由泵的安装条件确定，然后再要求泵的NPSHR适应已确定的NPSHA。对于化工用泵一般采用后者。无论怎样确定都必须有NPSHA≥NPSHR+0.5(m)。对于化工用泵要求NPSHA较NPSHR大10％，且不得少于0.5m。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。