放松车轴螺母的前轮使轴可以移动下调至链紧张。

Loosen the axle nuts of the Front Wheel so that the axle can be moved downward to tension the chain.

youdao

如果把一台机器全部拆散开来，这台机器便成为一堆如螺母、螺钉、弹簧、齿轮、凸轮、轴等简单部件—即所有机械的构成单元。

Thus, if a machine is completely dismantled, a collection of simple parts remains such as nuts, Bolts, springs, gears, cams, and shafts the Building Blocks of all machinery.

youdao

东莞市凤岗永盟五金制品厂专业生产加工自动车床件，数控车件，五金轴销，插销，铜螺母等五金产品。

Yong Feng Gang, Dongguan City, Union metal products Factory specialized in producing automatic lathe, CNC lathe parts, metal axle pin, bolt, brass nuts and other metal products.

youdao