交通运输工程
friction factor
By test plastic corrugated pipes’ friction factor was determined, the extension of prestressed steel bundles was measured and analyzed, and the vacuum pumping technique was investigated.
通过试验确定塑料波纹管的孔道摩阻系数,对预应力钢束张拉伸长量进行分析,并对预应力孔道真空辅助压浆工艺进行探讨。
生物学
mole
morgan unit
morgan
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