Then, pneumatic valve spring made from this spring steel wire have been treated by this investigation of liquid tufftriding process.
然后，用以对此规格的钢丝制造的气阀弹簧进行了低温液体软氮化处理。
2
Rotating device for electric drum, and equipped with pneumatic tyre and steel wheel two walking wheels.
转动装置为电动滚筒，并配有充气轮胎和钢轮两种行走轮。
3
Continuous loop for the material, configuration, pneumatic pump, electric pump and a set of the stainless steel tank, fit oily water-based glue suitable using.