With an example of a section of air duct with a tee, analyses the existing problems when adjusting pipe diameter according to the pressure balance formula and the causes.
以一段带三通的并联风管为例，分析了根据该压力平衡公式调整管径时存在的问题及其原因。
Results indicate that spectral super-broadening without self-focus can be achieved by adjusting the pump power and the beam diameter.
分析得出：通过改变泵浦光的功率和光束口径，可以实现光谱的极大展宽并避免自聚焦成丝。
With unified adjusting function, it can preset welding wire diameter and welding current, can automatically match out the regulated welding parameter, it's easy to for beginner to operate.
具有一元化调节功能，可预置焊接电流，能自动匹配规范的焊接参数，操作简单，有利于初用者的操作。
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