中国高铁离不开日本“永不松动的螺母”,我国会被日本卡脖子?【Hi科普啦】 Click Cancel Mute Play next after 5 s 中国高铁离不开日本“永不松动的螺母”,我国会被日本卡脖子?【Hi科普啦】 | 2 years ago 2.3K | 2 years ago | Popular science 2K Share 闪电哥科普啦 Follow
13:11 10 Most Mysterious Discoveries Found In The Mountains! Origins Explained Series 3.6K | 2 years ago
52:53 Most Dangerous Animals & Craziest Creature Sightings! | ORIGINS EXPLAINED COMPILATION 29 Origins Explained Series 3.7K | 2 years ago