Best layout and performance are achieved with at least a 4-layer multilayer board, where there is a ground planelayer, a power supply layer, and two signal layers.
电路板至少需要4层才能实现最佳布局和性能：一个接地层、一个电源层和两个信号层。
2
The utility model relates to a rescue extrusion device which consists of a body profile rolled by a planelayer (1) and a binding piece (2) at both ends of the planelayer.
本实用新型涉及一种抢救挤压装置，它有一个由平面层(1)和平面层两端的结合件(2)卷成的体廓。
3
The result is a double-layer distribution of charges-for example, a plane of negative heads and an adjacent diffuse cloud of positive counterions.