1.在全站仪中，“HR”standsforhorizontalangle.2.“HD”denoteshorizontaldistancedestroyedbywater.3.“DZ”referstoverticaldistancedifference.4.“DHD”representsthedifferenceindepth(range).5.“DHR”istheabbreviationforhorizontalangledifference(range).6.Thesetermsareappliedintacheometryusingatotalstation.详情