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zi zhi yuan gui dao
Author(s): 
Pages: 30
Year: Issue:  2
Journal: Farm Machinery

Keyword:  圆规刀橡胶密封圈缝纫机针密封胶圈胶垫回推;
Abstract: <正> 在拖拉机维修保养时,常需更换各种大小不一的"O"型密封胶圈或圆形胶垫,现介绍一种自制"O"型橡胶密封圈、垫的圆规刀。找一根折断了的废缝纫机针,将折断处在油石上磨成锋利的扁平尖头状,即可作为圆规刀使用。使用时将制做的圆规刀紧固在普通圆规的一个脚上,圆规另一脚用原配圆锥形尖针。这样,即可方便地以针尖为圆心,以自制圆规刀为半径,在各种橡胶薄片上(如各
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