短語詞組短語branch h hole 側(cè)眼directional branch -hole drilling 定曏分支孔鑽進(jìn)branch hole drilling 分支井鑽井directional branch hole 分支鑽孔full -gauge branch hole 與主鑽孔直逕相同的分支鑽孔S -type directional branch hole 型定曏分枝孔 返回 branch hole