1) PD 3 steel grade
PD3钢种
3) PD3 rail steel
PD3钢轨钢
4) PD3 rail
PD3钢轨
1.
It is introduced the experimental research of welding process of 60 kg/m PD3 rail made in Bao Steel factory by using K190Π K rail welding machine.
介绍了采用K190ΠK焊机焊接包钢60kg/mPD3钢轨的工艺试验结果,分析了PD3钢轨的焊接与正火工艺特点,提出了稳定钢轨焊接质量的工艺措施。
2.
The specimens of PD3 rail and U71Mn rail with oblique cracks were analyzed by examinations including chemical composition,mechanical properties and.
结果表明:由于轮轨间摩擦力的反复作用,导致疲劳微裂纹的萌生与扩展,裂纹在钢轨表面与行车方向成一定夹角,沿着钢轨塑性流变方向在钢轨内部朝斜向下的方向扩展;PD3钢轨的强度性能优于U71Mn钢轨,但U71Mn钢轨更适合于高速铁路铺设使用。
5) U75V(PD3)rail
U75V(PD3)钢轨
6) PD_3
PD3
1.
The result showed that fruit thinning agent-PD_3 applied 5 days and 10 days after full bloom at concentrations 2 000～3 000 mg/L were satisfied to requirement of production.
为明确疏果剂PD3对'鸭梨'疏果效应和疏果后的落果动态,对此进行了研究。
补充资料：钢种
钢精。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条