针对钱塘江赫山湾段涌潮影响大、涂面高程低的特点，阐述了围堰结构设计、围堰施工时促使钱塘江涂面自然淤高所采取的技术措施及围堰施工方法。
The paper talks about the methods and measures of cofferdam construction, specially about the cofferdam structure design in Heshan of Qiantangjiang River with strong tide and low surface coating.
提高钻孔涌水量是低渗透砂岩型铀矿床地浸开采的重要内容。
To improve the flow rate of well is of importance to in-situ leaching of uranium in low permeable deposits.
尽管此类电涌所发生的电流和电压要比ANSI或IEC的仿真电涌(发生几率)要低，但它们有着特殊的破坏性。
Although the voltages and currents associated with this type surge are much lower than the types of surges modeled by ANSI or IEC, they have a particularly destructive quality of their own.
且常发生井漏、气侵、坍塌性卡钻、井涌与井喷等井下复杂问题，导致机械钻速低与钻井事故频发。
Low penetration as well as drilling incidents of high frequency resulted from problems caused by leakage, gas migration, collapsing sticking, well kick, blowout and so forth.
提高钻孔涌水量是低渗透砂岩型铀矿床地浸开采的重要内容。
Using new type material of strictress leakage stoppage for drill leaking of diamond drilling.
提高钻孔涌水量是低渗透砂岩型铀矿床地浸开采的重要内容。
Using new type material of strictress leakage stoppage for drill leaking of diamond drilling.
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