A.圓形結(jié)構(gòu)符號(hào)B.柱狀結(jié)構(gòu)符號(hào)C.環(huán)形結(jié)構(gòu)符號(hào)D.正方形結(jié)構(gòu)符號(hào)
A.雙方移位B.單方移位C.對(duì)方位移D.己方位移
A.緯線為同心圓B.經(jīng)線緯線相互垂直C.經(jīng)線為放射直線D.兩經(jīng)線間夾角與相應(yīng)經(jīng)差相等