1) PF ring
PF环
1.
A generalization of PF rings relative to commutative rings: rings all finitely generated projective modules with constant rank of which are free is defined.
对交换环定义了广义PF环的概念 ,即一切具有常数秩的有限生成投射模都为自由模的交换环。
2) PF-Ring
PF-环
1.
Almost Excellent Extensions and Kasch,PF-Rings;
几乎优越扩张及Kasch.PF-环
3) Reduce PF-Ring
简约PF—环
4) local left PF ring
局部左PF环
5) PF-PF model
PF-PF模型
6) PF value
PF值
1.
Carbon potential in heat treatment furnaces can be accurately controlled by PID parameter adjusting,PF value revising,calibrating for the controlling system of carbon potential,and correct choosing,installing,using,maintaining for oxygen probe,and these measures are favourable very for improving service life of oxygen probe also.
通过对碳势控制系统的PID参数调整、PF值修正、校准,及对氧探头的正确选择、安装、使用、维护保养,不仅可以对热处理炉内碳势进行精确控制,而且对提高氧探头使用寿命十分有利。
2.
The results indicated that the average PF value was only 0.
结果表明:果实发育56d时,平均PF值仅为0·086。
补充资料：Fluorinert PF 5070
CAS：335-57-9
分子式：C7F16
分子质量：388.05
沸点：80℃
中文名称：全氟庚烷；十六氟庚烷；全氟正庚烷
英文名称：hexadecafluoro-Heptane；Perfluoroheptane；hexadecafluoro-heptan；perfluoro-n-heptane；hexadecafluoro-heptane；Fluorinert PF 5070
分子式：C7F16
分子质量：388.05
沸点：80℃
中文名称：全氟庚烷；十六氟庚烷；全氟正庚烷
英文名称：hexadecafluoro-Heptane；Perfluoroheptane；hexadecafluoro-heptan；perfluoro-n-heptane；hexadecafluoro-heptane；Fluorinert PF 5070
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