screed board vibrator

例句：

1. 1.The construction crew uses a screwed-in board to scrape the concrete floor.
   建筑工人使用一块螺丝固定的刮板来刮擦混凝土地板。
2. 2. The engineer used a screwed-in board as a vibrator to test the strength of the beam.
   工程师使用一块螺丝固定的刮板作为振动器来测试梁的强度。
3. 3. The technician adjusted the screwed-in board to ensure it was evenly distributed across the surface.
   技术人员调整了螺丝固定的刮板，以确保它均匀地分布在表面上。