Contact resistance is too large, the temperature rise faster, make joints of heat than thermal oxide film thickening, and also allows greater contact resistance, temperature rise faster.
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At this stage, as a result of plate temperature, residual water and not easy to gasification temperature rise faster, so products.
在这一阶段初期，由于板温升高，残余水分少又不易气化，因此制品温度上升较快。
When the rise time is steeper, the temperature rises faster, and the surrounding of the machining filed are less affected while the distance of the thermal diffusion reduces.
当激光器上升沿变陡时，在有效作用时间内温度上升得更快，对加工区域周围热效应的影响明显减弱，而热扩散距离变小。
The high efficiency heating element whose temperature can rise quickly, and the effect is more uniform and faster than the normal desoldering station.
大功率发热芯，升温迅速，比普通热风拔放台吹焊更快速，效果更均匀。
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