Some questions on terminology of BladeGen

Darcy

Dear all I got some questions on BladeGen terminology. I don't know the meanings of these terms :

1.Urms 2.Cm 3.Ct 4.C(abs total) 5.Flow Angle(abs) 6.Wt(rel tang) 7.W(rel total) 8Flow Angle(rel)

Since this is my first trip to design and analysis of pump. I hope that there is someone generous enough to explain these term for me. thanks first darcy