中国大学MOOC: 直立摆放的圆柱，左右轮廓素线在左视图中的投影在哪里？Where is the projection of generating lines in the left view when the axis of a cylinder is right to the projection plane of H-projection plane？
举一反三
- 直立摆放的圆柱，左右轮廓素线在左视图中的投影在哪里？Wher... H-projection plane？
- The commonly-used engineering drawings are： A: Multi-view projection B: Cartographical projection C: Perspective projection D: Axonometric projection
- 中国大学MOOC: 四棱锥的投影，有两面投影外轮廓一定是三角形（）。There are two side views having triangles for the projection of a square pyramid.
- Please choose the right statment on cutting symbol“┏1” A: The cutting position is along the horizontal direction B: The projection direction is from the left to the right C: The number of "1" means the positioning axis ① D: The line width (thickness) of the symbol should be 1.4b
- Please choose the right statment on cutting symbol“┏1” A: The cutting position is along the horizontal direction B: The projection direction is from the left to the right C: The number of "1" means the positioning axis ① D: The line width (thickness) of the symbol should be 1.4b