槽头螺钉的俯视图。
Side view of wing screw with adjustable thread length.
螺纹长度可调整的翼形螺钉的侧面图。
Screw on spoiler and additional wing.
拧紧扰流板和附加翼子板。
The air crash took place because a screw on the plane's wing came loose.
空难发生的原因是机翼上的一根螺丝松了。
The air crash took place because a screw on the plane's wing came loose.
空难发生的原因是机翼上的一根螺丝松了。
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