根据取样分析地表河水、钻孔内地下水对混凝土结构、对钢筋混凝土中钢筋、对钢结构均具微腐蚀性。
According to sampling analysis the surface river water and ground water in borehole have micro-corrosion on concrete structure rebar in reinforced concrete and steel structure.
在生产领域，激光可以用来钻孔、切割、连接、硬化以及进行表面改性和微加工。
In the area of manufacturing, lasers are used for drilling, cutting, joining, hardening, surface modification and micromachining.
方法对43例慢性硬膜下血肿患者行改良微创钻孔冲洗引流术。
Methods 43 patients with chronic subdural hematomas were treated by the improved minimally invasive surgery of drainage.
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