Basically smooth and shiny on the surface, have no obvious fault of contraction dent, brindle, warpage, defective bubble and plastify.
表面基本上平滑光亮，无明显收缩凹痕，斑纹，翘曲，气泡及塑化不良等缺陷。
Moving cowl, decreasing interior contraction ratio also can realize the hypersonic sidewall compression inlet's self-starting because of separation bubble on sidewall spilling out.
移动唇口板以减小内收缩比可以实现侧压式进气道自起动，主要是因为侧板分离包被排出进气道。
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