Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?
是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？
The presence of primary hole air flows remarkably squeezes the recirculation zone, resulting in a elliptic-like cross section, with the long axis is longer than the short one up to 1.6 times.
发现真实结构燃烧室内的回流区不再是轴对称，主燃孔和二次气流的存在使回流区明显被压扁（最扁处的长轴约为短轴的1.6倍）；
Pressure and velocity fields of spatial cross section on an aircraft model with strake wing and double vertical tails were measured using a seven hole probe.
采用七孔探针对一种边条翼双垂尾布局的飞机模型进行了空间压力场和速度场的测量。
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