A.0.750m B.-0.750m C.3.198m D.-3.198m
A.fh=∑h測-(H終-H起) B.fh=∑h測-(H起-H終) C.fh=∑h測 D.fh=(H終-H起)-∑h測
A.+0.001m B.-0.001m C.+0.002m D.-0.002m