如果主丛 P 是标架丛,或更一般地如果他有一个焊接形式(solder form),则此联络是仿射联络的一个例子,曲率不仅不变,由焊接形式 θ 的加法结构,也要考虑到它是 P 上一个 R n-值 1-形式。
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Thermal fatigue life of lead-free solder joint of Air-conditioner PCB (Printed Circuit Board) under the form of THT (Through Hole Technology) is studied.
本文对空调器印刷电路板(PCB)通孔插装形式无铅焊点的热疲劳寿命进行了研究。
Solder Bridging: Solder connecting, in most cases, misconnecting, two or more adjacent pads that come into contact to form a conductive path.
桥接:焊料连接,通常是导线间由焊料形成的多余的导电通路。
All of the three solder pastes could form plump and splendid solder point, and the appearance of Sn-Pb solder point was more regular and sleek.
三种焊锡膏均可形成饱满、光亮的焊点,锡铅焊点外观比无铅焊点更规整圆滑。
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