v nb ti 钒铌钛
v-nb steel vnb钢
bearing v nb ti 钒铌钛
Cr-V-Ti-Nb 多元低合金
unique v-neck NB NB-H 英伦风开胸式格仔衬衫
nb-v 铌钒
Nb-V-microalloyed 铌钒微合金化
nb-v ductile iron nbv球铁
The method of measuring c, s, p, Mn, Si, Cr, Ni, Mo, V, W, ti, Nb, Al element content by DV-4 photoelectric spectroscope on one condition is introduced.
介绍了应用DV - 4光电光谱仪，仅用一种测定条件，测定高合金钢中碳、硫、磷、锰、硅、铬、镍、钼、钒、钨、钛、铌、铝元素的含量的方法。
The synergistic chromogenic reaction of Nb(V) with both bromopyrogallol red(BPR) and diantipyrylmethane(DAM) in the presence of polyvinyl alcohol(PVA) is studied.
探讨了在聚乙烯醇（PVA）存在下，铌与溴邻苯三酚红及二安替比林甲烷的协同显色反应。
The lamellar cracking was found at the specimen of HSLA Nb-V steel plate after tensile strength testing, then the fracture surface of the specimen was studied by SEM and EDAX.
针对高强度低合金铌钒钢板在拉伸试验后出现分层开裂的现象，采用SEM、EDAX进行微观分析，发现试样内部有大量夹杂物存在，这些夹杂物主要含有钙、氧、硫、锰等元素。
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