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。
The quick trunk injector comprises a reservoir pressure-meter, a spring balance, a transfusion pipe, a liquid valve, an air pinhead and a switch.
快速树干注射器主要由贮液瓶、压力表、弹簧秤、输液管、注药口、气门嘴、注射针头、开关等几部分组成。
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