side projection of blade

例句：

1. 1. The engineer drew a side projection of the building to show its dimensions to the client.
   工程师绘制了建筑的侧面投影图，以向客户展示其尺寸。
2. 2. In the construction of a new bridge, engineers often use side projections to ensure structural integrity.
   在新桥的建设中，工程师经常使用侧面投影来确保结构完整性。
3. 3. The scientist used side projections to study the movement of molecules in the laboratory.
   科学家使用侧面投影研究实验室中分子的运动。