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.
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。
Cleanness: Very tight Molecular structure, surface free of micro pores Moisture proof.
清洁：分子结构十分紧密，表面无细孔。
This is ideal optical instrument for micro observation in metallographic structure and surface morphology. It is suitable for research in metallography, mineralogy, precision engineering, etc.
适用于金相组织及表面形态的显微观察，是金属学、矿物学、精密工程学研究的理想仪器。
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