基本解释：四边形,四边形的
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The scheme of "four sides, double drilling, double grouting and four-eight cross" is adopted and a new technology of chemical pregrouting is introduced in the inclined shaft construction.赵庄矿水文地质条件复杂,主斜井穿越多个厚砂岩含水层,井简水治理是阻碍掘进的难点,在主斜井施工中采取了“四边,双钻双注,四八交叉”施工方案,引进了化学预注浆新工艺,达到了预期封水效果,实现了快速施工。
<abstract>jective: To provide anatomical data for the pathogeny, and the dignosis and treatment of the quadrilateral foramen syndrome.目的:为四边孔综合征的(bìng)因和诊治提供解剖学基础。
