... 反应活性-选择性原理、reactivity-selectivity principle 催化剂选择性、催化选择性、catalyst selectivity 金属．金属键、metal-metal bond ...
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The longitudinal cracks along bond line and the transverse cracks which cut across the weld metal cross section inside weld metal were formed, while X65 pipe line steel was welding.
X65管线钢在焊接过程中，内侧焊缝金属出现横向和纵向沿熔合线方向的裂纹，横向裂纹贯穿焊缝金属横截面。
But this photoresist was then peeled off, leaving only a pure metal on metal bond.
但是这种光刻胶会被剥离，仅留下金属结合。
The defect testing and strength estimating of metal to metal single step-lap adhesive bond structures are studied by means of acoustic emission (AE) technique.
应用声发射检测技术研究金属铝单搭接胶接结构的缺陷检测和强度估计问题。
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