High voltage silicon pile is the key component of the output circuits of color TV and color monitor, whose switch frequency is the direct restrictive factor of line scan.
高压硅堆是彩电和彩色显示器行输出电路中的关键器件，其开关速度的快慢直接限制了行扫描频率的高低。
2
Pile length is a key parameter in cement mixing pile composite foundation design.
水泥搅拌桩桩长是复合地基设计中的一个主要参数。
3
The calculation of pile internal force is the key in designing piles.