在此基础上，对宋代梓州与中江洪水的概况和规律作出归纳与概括。
Last of all, give a brief account of these floodwater survey and regularity.
中江地区沙溪庙组地层在钻井过程中一直存在比较严重的垮塌现象，给该区钻井施工带来较大的技术难题和经济上造成较大损失。
Serious collapsing is always existed in the drilling process in Shaximiao formation of Zhongjiang area, which brings technical difficulty in drilling operation and huge economic loss.
中江地区沙溪庙组地层在钻井过程中一直存在比较严重的垮塌现象，给该区钻井施工带来较大的技术难题和经济上造成较大损失。
Serious collapsing is always existed in the drilling process in Shaximiao formation of Zhongjiang area, which brings technical difficulty in drilling operation and huge economic loss.
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