Two groups of matching relation of the weld speed and the wire feed rate were found in a condition of invariable laser power and focus position.

前者试验获得了一定激光功率和离焦量条件下两组焊接速度和送丝速度的匹配关系，并发现填充焊丝的加入对焊缝咬边现象确有改善；

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Both research groups use wire made of a standard alloy of nickel and iron that is easy to magnetise.

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To hear Phiyega, the police commissioner, describe it, the police weighed all their options and decided to fence in the miners with barbed wire -- to compartmentalize them into more manageable groups.

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