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。

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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。

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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.

回圈式连续供料，配置气动抽油泵，电动抽油泵各一组及不锈钢油槽，适合水性油性胶水的使用。

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Cycling's innovations, including spokes, pneumatic tyres, ball bearings, steel tubing and differential gears, were soon borrowed by the motor industry.

ECONOMIST: How Robert Penn found himself the perfect two-wheeler