六角形的螺母，一次只需要把扳手扳动60度，就能够慢慢把螺母拧紧。

Six angular nuts, one time only need the spanner to move 60 degrees, can screw tight slowly the nut.

youdao

六角形的螺母，一次只需要把扳手扳动60度，就能够慢慢把螺母拧紧。

Six angular nuts, one time only need the spanner to move 60 degrees, can screw tight slowly the nut.

youdao