It also states a troubleshooting analysis of the undercarriages retractile system.
还包括一次起落架收放系统的故障分析。
Any of numerous aquatic or terrestrial mollusks of the class Gastropoda, typically having a spirally coiled shell, broad retractile foot, and distinct head.
蜗牛:腹足科众多水生或陆栖软体动物中的一种,通常带有一螺旋似的厚壳,足宽且向内旋,脑袋清晰。
Any of numerous aquatic or terrestrial mollusks of the class Gastropoda, typically having a spirally coiled shell, broad retractile foot, and distinct head.
蜗牛:腹足科众多水生或陆栖软体动物中的一种,通常带有一螺旋似的厚壳,足宽且向内旋,脑袋清晰。
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