以下为句子列表：
英文: In order to represent the six direction shape of the part, according to the national standards, the principle views are the projective views of basic projective planes, putting the part into the three-dimensional box, which six planes as the basic project
中文: 为了表达机件上下、左右、前后的形状，制图标准中规定，以正六面体的六个面作为基本投影面，将机件置于正六面体内，分别向各个基本投影面投射所得的图形称为基本视图。
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