目的评价螺旋ct表面覆盖法(SSD)在胰腺癌诊断中的价值。
Purpose To investigate the technique of shaded surface display (SSD) spiral CT (SCT) in the diagnosis of pancreatic carcinoma.
采用投影覆盖法结合激光三角测试技术，直接测定了混凝土断裂表面分维值。
The fractal dimension of fracture surface was measured directly by using projective covering method and laser triangulation technique.
钢管的表面处理是决定覆盖层质量的关键因素，对大多数覆盖层而言，喷(抛)丸除锈法是最理想的除锈方式。
Surface cleaning is critically important for pipe coating, and shot (impeller) blasting is the most suitable derusting method for most kinds of coating materials.
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