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1)  burning bar of lead
铅焊条
2)  silver-lead solder alloy
银铅焊条合金
3)  welding of lead
铅焊
4)  leads [英][led]  [美][lɛd]
铅条
5)  welding rod
焊条
1.
Improvement method of testing welding rod surface parting shape dimensions using lock phase amplifier;
锁相放大器测试焊条表面分形维数的改进
2.
The influence of melt slag basicity to welding rod coating alloying element transition coefficient;
熔渣碱度对焊条药皮中合金元素过渡系数的影响
6)  covered electrode
焊条
1.
Evaluation of typical metal transfer modes for covered electrode;
焊条典型熔滴过渡形态的判读
2.
and the tendency for hydrogen - induced cracking of the T91/ 12Cr1MoV joint welded with different covered electrodes was investigated by means of electrolytic hydrogen charging and constant - load delayed cracking test.
用甘油法测定了从日本进口的CM-9Cb焊条、国内新研制的T91专用焊条以及R317焊条熔敷金属中的扩散氢含量。
补充资料:铅-铅测年
分子式:
CAS号:

性质:238U和235U两个母体铀同位素的特性实质相同,所产生的放射性成因206,207Pb的方程可合并为(207Pb/206Pb)=[(235U/238U)](t-1)。235U/238U现在的比值是1/137.8,利用非放射性成因‘稳定’204Pb作为参考同位素,作(207Pb/204Pb)与(206Pb/204Pb)的Pb-Pb等时线,应用方程计算年龄,式中(207Pb/204Pb)和(206Pb/204Pb)0是初始比值。

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