Architectural freehand sketching
cracking and sketching element
sketching
草图
素描
手绘
速写
略图
画
草绘
画架
手绘草图
画草图
草绘设计
16 E1 Interface Board GE16
2D thin board elastic flexure
2-side printed circuit board
80C320 type single board computer
a board with an inscription