A.豎盤指標(biāo)差 B.照準(zhǔn)部水準(zhǔn)管軸不垂直于豎軸 C.視準(zhǔn)軸不垂直于橫軸 D.水平度盤刻劃誤差
A.91°45′24″ B.268°14′36″ C.148°17′00″ D.91°14′36″
A.A點(diǎn)比B點(diǎn)高0.435m B.A點(diǎn)比B點(diǎn)低0.435m C.A點(diǎn)比B點(diǎn)高2.899m D.A點(diǎn)比B點(diǎn)低2.899m