The value of root pressure is usually about ……………..
A. +1 to +12 bars
B. -1 to +1 bars
C. +1 to +2 bars
D. +1 to +21 bars
Answer:C
The value of root pressure is usually about ……………..
A. +1 to +12 bars B. -1 to +1 bars C. +1 to +2 bars D. +1 to +21 bars