Methods determining exploration engineering interval include geological statistic method, SD method and empirical method.
确定矿产勘查工程间距的方法主要有地质统计学法、SD法和经验法。
Use Semantic Differential method (SD method) to analysis electric bicycle design characteristics, extract the modelling elements of electric bicycle's appereance.
应用意象尺度法（即SD法）对现有电动自行车造型特点进行了分析，提取了电动自行车的造型元素。
SD method, one of three reserves calculation methods like geometry, Krige and SD methods in China, is a new mineral resources reserves calculation and examination method.
SD法是一种全新的储量计算和审定方法，是我国使用的三大储量计算方法（传统法、克里格法和SD法）之一。
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