The A-line, in unified classification system table has the equation of

1.	The A-line, in unified classification system table has the equation of __________
A.	IP=WL-20
B.	IP=0.73(WL-20)
C.	IP=0.73(20-wL)
D.	IP=20-WL
Answer» C. IP=0.73(20-wL)

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