视频Videos
白板科普每天一期（中英各一），缝纫机设计与制造课的讲课视频。点画面就在这里播放，也可以去 YouTube 看。A whiteboard science short every day (Chinese and English) and lectures from the sewing machine design course. Click a picture to play it here, or watch on YouTube.
白板科普每天一期（中英各一），缝纫机设计与制造课的讲课视频。点画面就在这里播放，也可以去 YouTube 看。A whiteboard science short every day (Chinese and English) and lectures from the sewing machine design course. Click a picture to play it here, or watch on YouTube.