The projecting lines are discussed by using the line of intersection in horizontal ( H ) plane, profile ( W ) plane and frontal ( V ) plane.
并讨论相贯线在水平（H）面，侧立（W）面，正立（V）面上的投影线。
2
The structural stabilities and electronic structures of W atomic chains are studied by employing first-principles plane wave pseudopotential method based on the density functional theory.
使用基于密度泛函理论的第一原理平面波赝势法，研究了W原子链的结构稳定性和电子结构性质。
3
The space configuration illustrated in v? H? W three-plane projection drawing (i. e. front view, top view and left view) can generally be determined completely.