A. 从三角形分布的三个钻孔中测定水位，按从高到低连线方向
B. 从多个钻孔测定地下水位确定其等水位线，按其由高到低垂线方向
C. 从带多个观测孔的抽水试验中测定水位，按主孔与最深水位连线方向
D. 从带多个观测孔的压水试验中测定水量，按主孔与最大水量孔连线方向
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